Re: [CentOS] Cluster SW

[santosh venkataswamy]

Hi,
 I want to configure Fail over cluster.
 
With Regards and  good wishes.

V.SANTOSH



 From: Woehrle Hartmut SBB CFF FFS (Extern) 
To: CentOS mailing list  
Sent: Thursday, April 11, 2013 4:05 PM
Subject: Re: [CentOS] Cluster SW
 

> Hi,
> How to download  Cluster SW and how to configure clustering in CentOS.
>With Regards and  good wishes.
>
>V.SANTOSH

What do you want to cluster (disks, services, data,...)
How (failover, loadbalancing, master-slave,...)

Hartmut


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Re: [CentOS] Cluster SW

[Rajagopal Swaminathan]

Greetings,



On Mon, Apr 15, 2013 at 2:07 PM, santosh venkataswamy wrote:

> Hi,
>  I want to configure Fail over cluster.
>
>

You need RHCS (paid subsription)
or
Centos

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Re: [CentOS] Cluster SW

[Woehrle Hartmut SBB CFF FFS (Extern)]

Hi

> Hi,
> I want to configure Fail over cluster.
> 
> With Regards and  good wishes.
>
> V.SANTOSH
In this case you should look in the Highavailablity and 
Highavailability-Management groups
Especially the packages heartbeat and gfs2-utils

Best Regards
Hartmut

>>> Hi,
>>> How to download  Cluster SW and how to configure clustering in CentOS.
>>>With Regards and  good wishes.
>>>
>>>V.SANTOSH
>>
>>What do you want to cluster (disks, services, data,...)
>>How (failover, loadbalancing, master-slave,...)
>>
>>Hartmut


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Re: [CentOS] trying to recover an audio CD...

[Joerg Schilling]

Fred Smith  wrote:

> I'm trying to recover data from an audio cd. it is a recording of a live
> session, made on a professional cd recorder, on the fly. 

Do you have any working CD from that drive? If yes, you could call:

cdrecord -minfo

to get the state and to find out whether it writes in TAO mode. (-minfo is a 
shortcut for -media-info).

> apparently, instead of stopping it and fixating the disc, someone turned
> off the power. oops.
>
> I know that wodim will fixate a disk as long as it was otherwise properly 
> terminated (I've done it more than once), but this one it won't fixate. 
> depending on the drive I try it in, I get different messages, but in
> either case, it remains unfixated.

wodim is a defective variant from an extremely outdated cdrecord (taken from a 
cdrecord from September 2004). 

-   Did you try the original software?

-   Is it possible to use the original drive that was used for writing?


> so i've tried reading it with cdparanoia, but it can't do anything with
> it, or not that I've figured out how to do.

cdparanoia is a patch on a cdda2wav version from 1997. There was never an 
update on the cdda2wav code and development stopped in 2001. Don't expect 
cdparanoia to be able to read such disks, as the _read_ properties in 
cdparanoia are generally bad compared to a recent cdda2wav.

Note that after the development for cdparanoia stopped around 2000/2001, Heiko 
Eißfeld and I took the "paranoia code" (the code in cdparanoia above the read 
layer that is responsible for retries and result rating) out of cdparanoia, 
made a portable library from it and added it to cdda2wav.

Your problem is that cdparanoia will never read a TOC-less disk and that the 
dead fork from a September 2004 cddda2wav called "icedax" is full of bugs.

The real cdda2wav has a compile option to set up a virtual TOC, but if you ever 
like to read a CD without a TOC, you not only need to tell cdda2wav the TOC by 
exiting the compiled in TOC, but you also need to kill any hostile software on 
your computer that tries to access CDs in an unapropriate way, such as "hald" 
or 
it's successors. Once such a program did try to access a problematic CD, you 
will never be able to access the CD unless you reload it - which will result in 
a new access attempt :-(

If the CD has a PMA (which I expect from writing in TAO mode), the disk should 
be readable by cdda2wav if you use a drive that understands the PMA.

Jörg

-- 
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   j...@cs.tu-berlin.de(uni)  
   joerg.schill...@fokus.fraunhofer.de (work) Blog: 
http://schily.blogspot.com/
 URL:  http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schily
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Re: [CentOS] Cluster SW

[santosh venkataswamy]

Hi,
 Thanks . I was able to ger the sw . Do you have system-config-cluster command 
in CentOS. Could you share some howtos on
creating a failover cluster in CentOS.
 
With Regards and  good wishes.

V.SANTOSH



 From: Woehrle Hartmut SBB CFF FFS (Extern) 
To: CentOS mailing list  
Sent: Monday, April 15, 2013 2:49 PM
Subject: Re: [CentOS] Cluster SW
 

Hi

> Hi,
> I want to configure Fail over cluster.
> 
> With Regards and  good wishes.
>
> V.SANTOSH
In this case you should look in the Highavailablity and 
Highavailability-Management groups
Especially the packages heartbeat and gfs2-utils

Best Regards
Hartmut

>>> Hi,
>>> How to download  Cluster SW and how to configure clustering in CentOS.
>>>With Regards and  good wishes.
>>>
>>>V.SANTOSH
>>
>>What do you want to cluster (disks, services, data,...)
>>How (failover, loadbalancing, master-slave,...)
>>
>>Hartmut


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Re: [CentOS] Cluster SW

[Vishesh Kumar]

Hello,

You can have a look on
http://www.centos.org/docs/4/html/rh-cs-en-4/ch-software.html.


On Mon, Apr 15, 2013 at 3:50 PM, santosh venkataswamy wrote:

> Hi,
>  Thanks . I was able to ger the sw . Do you have system-config-cluster
> command in CentOS. Could you share some howtos on
> creating a failover cluster in CentOS.
>
> With Regards and  good wishes.
>
> V.SANTOSH
>
>
> 
>  From: Woehrle Hartmut SBB CFF FFS (Extern) 
> To: CentOS mailing list 
> Sent: Monday, April 15, 2013 2:49 PM
> Subject: Re: [CentOS] Cluster SW
>
>
> Hi
>
> > Hi,
> > I want to configure Fail over cluster.
> >
> > With Regards and  good wishes.
> >
> > V.SANTOSH
> In this case you should look in the Highavailablity and
> Highavailability-Management groups
> Especially the packages heartbeat and gfs2-utils
>
> Best Regards
> Hartmut
>
> >>> Hi,
> >>> How to download  Cluster SW and how to configure clustering in CentOS.
> >>>With Regards and  good wishes.
> >>>
> >>>V.SANTOSH
> >>
> >>What do you want to cluster (disks, services, data,...)
> >>How (failover, loadbalancing, master-slave,...)
> >>
> >>Hartmut
>
>
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Re: [CentOS] phpmyadmin location

[SilverTip257]

On Sat, Apr 13, 2013 at 1:33 PM, Bruce Whealton
wrote:

> Hello all,
>  So, I installed phpmyadmin from the yum package manager.  I am not
> sure where it would be installed.  In other words, I don't know how to
> reach
>

I'll figure it's the package from EPEL which is dropped
into /usr/share/phpMyAdmin/


> it in my browser.
>

Accessing pMa in the browser is unrelated to where it actually resides on
disk.
If you look in /etc/httpd/conf.d/ you'll likely find phpMyAdmin.conf which
is what you're really after.

Try plugging in http://your_ip_or_domain_here/phpMyAdmin/ and see what you
get.


> Can someone help me, please,
> Thanks,
> Bruce
>
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Re: [CentOS] Cluster SW

[Digimer]

On 04/15/2013 05:19 AM, Woehrle Hartmut SBB CFF FFS (Extern) wrote:
> Hi
>
>> Hi,
>>   I want to configure Fail over cluster.
>>
>> With Regards and  good wishes.
>>
>> V.SANTOSH
> In this case you should look in the Highavailablity and 
> Highavailability-Management groups
> Especially the packages heartbeat and gfs2-utils
>
> Best Regards
> Hartmut

Heartbeat is deprecated and has not and will not be developed any 
further. Please do not use heartbeat. Use corosync with either pacemaker 
or cman + rgmanager (rhcs).

-- 
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Re: [CentOS] Cluster SW

[Digimer]

That's for CentOS 4 which is EOL.

It's much better to use CentOS 6.

On 04/15/2013 06:47 AM, Vishesh Kumar wrote:
> Hello,
>
> You can have a look on
> http://www.centos.org/docs/4/html/rh-cs-en-4/ch-software.html.
>
>
> On Mon, Apr 15, 2013 at 3:50 PM, santosh venkataswamy 
> wrote:
>
>> Hi,
>>   Thanks . I was able to ger the sw . Do you have system-config-cluster
>> command in CentOS. Could you share some howtos on
>> creating a failover cluster in CentOS.
>>
>> With Regards and  good wishes.
>>
>> V.SANTOSH
>>
>>
>> 
>>   From: Woehrle Hartmut SBB CFF FFS (Extern) 
>> To: CentOS mailing list 
>> Sent: Monday, April 15, 2013 2:49 PM
>> Subject: Re: [CentOS] Cluster SW
>>
>>
>> Hi
>>
>>> Hi,
>>> I want to configure Fail over cluster.
>>>
>>> With Regards and  good wishes.
>>>
>>> V.SANTOSH
>> In this case you should look in the Highavailablity and
>> Highavailability-Management groups
>> Especially the packages heartbeat and gfs2-utils
>>
>> Best Regards
>> Hartmut
>>
> Hi,
> How to download  Cluster SW and how to configure clustering in CentOS.
> With Regards and  good wishes.
>
> V.SANTOSH

 What do you want to cluster (disks, services, data,...)
 How (failover, loadbalancing, master-slave,...)

 Hartmut
>>
>>
>> ___
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>> http://lists.centos.org/mailman/listinfo/centos
>>
>
>
>


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Re: [CentOS] Cluster SW

[Digimer]

On 04/15/2013 04:37 AM, santosh venkataswamy wrote:
> Hi,
>   I want to configure Fail over cluster.
>
> With Regards and  good wishes.
>
> V.SANTOSH

What service(s) are you trying to make fail-over? The more detail you 
provide, the better advise we can give.

This is a tutorial for making virtual machines fail-over. If you want to 
make another service fail-over, it should still help you understand how 
RHCS works;

https://alteeve.ca/w/2-Node_Red_Hat_KVM_Cluster_Tutorial

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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/12/2013 6:53 PM, John R Pierce wrote:
> On 4/12/2013 2:33 PM, Bowie Bailey wrote:
>> I had to replace the motherboard on one of my CentOS 4 systems and am
>> now getting a kernel panic.
> what chipset and storage controller was the old board?   what chipset
> and storage controller is on the new one?

The old board was an ASUS A8N-VM CSM with the NVIDIA nForce 430 chipset.

The new board is an ASRock A785GM-LE board with the AMD SB710 chipset.

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Re: [CentOS] phpmyadmin location

[Rodrigo Pichiñual Norin]

Hi

you tried with this command:

find / -name phpmyadmin

or


find / -name phpMyAdmin



this is for know where is phpmyadmin



2013/4/15 SilverTip257 

> On Sat, Apr 13, 2013 at 1:33 PM, Bruce Whealton
> wrote:
>
> > Hello all,
> >  So, I installed phpmyadmin from the yum package manager.  I am
> not
> > sure where it would be installed.  In other words, I don't know how to
> > reach
> >
>
> I'll figure it's the package from EPEL which is dropped
> into /usr/share/phpMyAdmin/
>
>
> > it in my browser.
> >
>
> Accessing pMa in the browser is unrelated to where it actually resides on
> disk.
> If you look in /etc/httpd/conf.d/ you'll likely find phpMyAdmin.conf which
> is what you're really after.
>
> Try plugging in http://your_ip_or_domain_here/phpMyAdmin/ and see what you
> get.
>
>
> > Can someone help me, please,
> > Thanks,
> > Bruce
> >
> > ___
> > CentOS mailing list
> > CentOS@centos.org
> > http://lists.centos.org/mailman/listinfo/centos
> >
>
>
>
> --
> ---~~.~~---
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> //  SilverTip257  //
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>



-- 


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*87272971 *
rodrigo.pichin...@gmail.com / rodr...@latitud33.cl

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Re: [CentOS] phpmyadmin location

[Arun Khan]

On Sat, Apr 13, 2013 at 11:03 PM, Bruce Whealton
 wrote:
> Hello all,
>  So, I installed phpmyadmin from the yum package manager.  I am not
> sure where it would be installed.  In other words, I don't know how to reach
> it in my browser.

By default, the rpm installation creates an Apache Alias "/phpmyadmin"
(take a look at the httpd.conf file).

You can access it with /phpmyadmin>  ip_number can
be localhost, DNS name, or ip number.

Follow the common password policy (> 8 chars alpha numeric upper/lower case).

In case this system is on an Internet facing network, I would suggest
you put some kind of access control on the directory e.g. .htaccess
Basic Auth.

HTH
-- 
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Sent from my non-iphone/non-android device
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[CentOS] upload a file to new github repository

[ken]

Though I've used version control systems before and even set up a couple 
over the years, and though it was simple to setup a github repository 
(which I did just a couple minutes ago), I can't figure out how to 
upload the first file to it.  I'm logged in, on the repository's home 
page, but can't see an option for that.  I also read instructions for 
set up on the web and the git manpage, but no help there.  Anybody here 
know to put a code file into the repository?

Thanks.
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Re: [CentOS] upload a file to new github repository

[Adam Wead]

Sounds like you're trying to add the file from the web interface.  Usually
you add the files via the filesystem you've cloned the repo to. Ex:

git clone https://git.com/username/my-repo
cd my-repo
[edit/add files]
git status # to preview your chnages
git commit -m"Adding new and changed files to my repo"
git push

Then go to https://git.com/username/my-repo

and you should see the changes.  I'm assuming you're putting all your
changes in your master branch.

I guess you can files via the web interface, but I've never done that.

...adam


Adam Wead
Systems and Digital Collections Librarian
Rock and Roll Hall of Fame and Museum
216.515.1960 (t)
215.515.1964 (f)


On Mon, Apr 15, 2013 at 11:12 AM, ken  wrote:

> Though I've used version control systems before and even set up a couple
> over the years, and though it was simple to setup a github repository
> (which I did just a couple minutes ago), I can't figure out how to
> upload the first file to it.  I'm logged in, on the repository's home
> page, but can't see an option for that.  I also read instructions for
> set up on the web and the git manpage, but no help there.  Anybody here
> know to put a code file into the repository?
>
> Thanks.
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[CentOS] Asterisk, IAXModem and Hylafax

[James B. Byrne]

Arch = x86_64
OS = CentOS-6.3 (FreePBX)
Asterisk = 11.3.0 (FreePBX)
Hylafax+ = 5.5.3  (epel)

I am installing an Asterisk server with the intent of having it act as
our fax server.  The Asterisk system was installed using the current
FreePBX distro which is reputedly based on CentOS-6.3. I have
installed Hylafax+ from epel and I have built and packaged
IAXModem-1.2.0 for CentOS-6 using mock and installed that on the
Asterisk host.

I am past the point of setting up Asterisk and configuring extensions
and users.  I am able to place and receive internal calls to and from
SIP devices and place and receive external calls over a PSTN analogue
trunk.  The echo generated by the SIP clients is terrible but that
problem can wait until I get to dealing with voice service
implementation.

At the moment I am trying to get Hylafax configured.  I have done this
in the past albeit for systems using external serial modems.  I am at
the point of running the faxstup utility which builds the necessary
hylafax configuration files.  I am getting these errors from the
utility:


Setting Ghostscript font path in /etc/hylafax/hyla.conf.


Warning: /usr/local/lib/ghostscript/fonts does not exist or is not a
directory!

The directory /usr/local/lib/ghostscript/fonts does not exist or this
file is not a directory.
This is the directory where the HylaFAX client applications expect to
locate font metric information to use in formatting ASCII text for
submission as facsimile.  Without this information HylaFAX may generate
illegible facsimile from ASCII text.


Warning: /usr/share/ghostscript/8.70/Resource/Font does not exist or
is not a directory!

The directory /usr/share/ghostscript/8.70/Resource/Font does not exist
or this file is not a directory.
This is the directory where the HylaFAX client applications expect to
locate font metric information to use in formatting ASCII text for
submission as facsimile.  Without this information HylaFAX may generate
illegible facsimile from ASCII text.


Warning: /usr/share/ghostscript/fonts does not exist or is not a
directory!

The directory /usr/share/ghostscript/fonts does not exist or this file
is not a directory.
This is the directory where the HylaFAX client applications expect to
locate font metric information to use in formatting ASCII text for
submission as facsimile.  Without this information HylaFAX may generate
illegible facsimile from ASCII text.

These packages are installed:
Installed Packages
ghostscript.x86_64  8.70-14.el6_3.1
@anaconda-CentOS-201207061011.x86_64/6.3
ghostscript-fonts.noarch
5.50-23.1.el6  
@anaconda-CentOS-201207061011.x86_64/6.3

Can anyone tell me what package I am missing or what else might be
causing the problem?  I realize that this is only tangentially a
CentOS question so I crave the list's forbearance.

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Hamilton, Ontario fax: +1 905 561 0757
Canada  L8E 3C3

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[CentOS] gnumeric spreadsheets for US taxes

[ken]

For years I've been doing my (US) taxes, along with the state and local 
taxes, using gnumeric.  I decided I should share what I've done with 
others.  So grab the package if you want... from:



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Re: [CentOS] upload a file to new github repository

[ken]

Hey, fellow Cleveland dude!

Thanks much.  That worked fine, though I did have to do a "git add" 
after adding file(s) in.  It got the files where they needed to go.

You might have noticed another post here from me about it, but what I 
put out there was a gnumeric workbook I've been using for a long time to 
do my taxes-- Federal, state of Ohio, and local (which you as a 
Cleveland guy know as RITA).  So if you haven't done your taxes yet, it 
might help.  

Thanks again.

On 04/15/2013 11:23 AM Adam Wead wrote:
> git clonehttps://git.com/username/my-repo
> cd my-repo
> [edit/add files]
> git status # to preview your chnages
> git commit -m"Adding new and changed files to my repo"
> git push
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[CentOS] ATI video driver problems

[m . roth]

User got upgraded to 6.4. Graphical mode video fails.

It's an AMD (nee ATI) RV620 (FirePro 2260).

So I finished upgrading everything, including kmod-fglrx. Based on the
xorg.conf's on there, it's been using the fglrx. Now, in Xorg.0.log, it
tells me "no supported AMD display adapters were found". I've been
on-and-off googling for hours, and can't figure out if the "legacy"
kmod-nvidia from elrepo will work: their info *ONLY* lists Radeon cards,
and I can't figure out what this damn thing is. Oh, lspci -v tells me it's
"ATI device 2343".

Anyone know what this card is like (AMD shows three different models of
the same name, and I have no idea which it is, and none uses a Radeon
name), and what driver I might use, or do I have to downgrade X

   mark, extremely tired of his user's machine

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Re: [CentOS] Asterisk, IAXModem and Hylafax

[Tim Nelson]

- Original Message -
> 
> Arch = x86_64
> OS = CentOS-6.3 (FreePBX)
> Asterisk = 11.3.0 (FreePBX)
> Hylafax+ = 5.5.3  (epel)
> 
...
> 
> At the moment I am trying to get Hylafax configured.  I have done
> this
> in the past albeit for systems using external serial modems.  I am at
> the point of running the faxstup utility which builds the necessary
> hylafax configuration files.  I am getting these errors from the
> utility:
> 
> 
> Setting Ghostscript font path in /etc/hylafax/hyla.conf.
> 
> 
> Warning: /usr/local/lib/ghostscript/fonts does not exist or is not a
> directory!
> 
...
> 
> These packages are installed:
> Installed Packages
> ghostscript.x86_64  8.70-14.el6_3.1
> @anaconda-CentOS-201207061011.x86_64/6.3
> ghostscript-fonts.noarch
> 5.50-23.1.el6
> @anaconda-CentOS-201207061011.x86_64/6.3
> 

I've run into this quite often. Typically I just create a symlink to where the 
font data is, then rerun 'faxsetup'. Ex:

ln -s /usr/share/ghostscript/8.70/lib /usr/share/ghostscript/fonts

Then, all is well.

Also, unrelated, ensure you disabled tokens in your Asterisk IAX config. 
Otherwise, iaxmodem will not register as it does not support tokens at this 
time.

--Tim
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Re: [CentOS] ATI video driver problems

[Ned Slider]

On 15/04/13 16:57, m.r...@5-cent.us wrote:
> User got upgraded to 6.4. Graphical mode video fails.
>
> It's an AMD (nee ATI) RV620 (FirePro 2260).
>
> So I finished upgrading everything, including kmod-fglrx. Based on the
> xorg.conf's on there, it's been using the fglrx. Now, in Xorg.0.log, it
> tells me "no supported AMD display adapters were found". I've been
> on-and-off googling for hours, and can't figure out if the "legacy"
> kmod-nvidia from elrepo will work: their info *ONLY* lists Radeon cards,
> and I can't figure out what this damn thing is. Oh, lspci -v tells me it's
> "ATI device 2343".
>
> Anyone know what this card is like (AMD shows three different models of
> the same name, and I have no idea which it is, and none uses a Radeon
> name), and what driver I might use, or do I have to downgrade X
>
> mark, extremely tired of his user's machine
>

It is no longer supported.

The current AMD driver [v13.1] ONLY supports Radeon HD 5000 series and 
above, with the legacy driver [v13.1 legacy] supporting older Radeon HD 
2000, HD 3000 or HD 4000 series cards (I assume yours is a 2000 series 
card) *BUT* the legacy driver does NOT support X server ABI 13 in the 
version of Xorg shipped with RHEL 6.4. So your card is not supported by 
AMD as the version of Xorg server in RHEL 6.4 is too new.


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Re: [CentOS] phpmyadmin location

[m . roth]

Rodrigo Pichiñual Norin wrote:
> Hi
>
> you tried with this command:
>
> find / -name phpmyadmin
> or
> find / -name phpMyAdmin
>
*Very long wait*.

Try a) locate phpmyadmin, or b) rpm -ql phpmyadmin, and get a list of
where it put everything.

   mark
>
>
> this is for know where is phpmyadmin
>
>
>
> 2013/4/15 SilverTip257 
>
>> On Sat, Apr 13, 2013 at 1:33 PM, Bruce Whealton
>> wrote:
>>
>> > Hello all,
>> >  So, I installed phpmyadmin from the yum package manager.  I
>> am
>> not
>> > sure where it would be installed.  In other words, I don't know how to
>> > reach
>> >
>>
>> I'll figure it's the package from EPEL which is dropped
>> into /usr/share/phpMyAdmin/
>>
>>
>> > it in my browser.
>> >
>>
>> Accessing pMa in the browser is unrelated to where it actually resides
>> on
>> disk.
>> If you look in /etc/httpd/conf.d/ you'll likely find phpMyAdmin.conf
>> which
>> is what you're really after.
>>
>> Try plugging in http://your_ip_or_domain_here/phpMyAdmin/ and see what
>> you
>> get.
>>
>>
>> > Can someone help me, please,
>> > Thanks,
>> > Bruce
>> >
>> > ___
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>> > CentOS@centos.org
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>> >
>>
>>
>>
>> --
>> ---~~.~~---
>> Mike
>> //  SilverTip257  //
>> ___
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>>
>
>
>
> --
>
>
> *Rodrigo Pichiñual *
> *Ingeniero en Computación*
> *87272971 *
> rodrigo.pichin...@gmail.com / rodr...@latitud33.cl
> 
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Re: [CentOS] ATI video driver problems

[m . roth]

Hi, Ned,

Ned Slider wrote:
> On 15/04/13 16:57, m.r...@5-cent.us wrote:
>> User got upgraded to 6.4. Graphical mode video fails.
>>
>> It's an AMD (nee ATI) RV620 (FirePro 2260).
>>
>> So I finished upgrading everything, including kmod-fglrx. Based on the
>> xorg.conf's on there, it's been using the fglrx. Now, in Xorg.0.log, it
>> tells me "no supported AMD display adapters were found". I've been
>> on-and-off googling for hours, and can't figure out if the "legacy"
>> kmod-nvidia from elrepo will work: their info *ONLY* lists Radeon cards,
>> and I can't figure out what this damn thing is. Oh, lspci -v tells me
>> it's "ATI device 2343".
>>
>> Anyone know what this card is like (AMD shows three different models of
>> the same name, and I have no idea which it is, and none uses a Radeon
>> name), and what driver I might use, or do I have to downgrade X
>
> It is no longer supported.
>
> The current AMD driver [v13.1] ONLY supports Radeon HD 5000 series and
> above, with the legacy driver [v13.1 legacy] supporting older Radeon HD
> 2000, HD 3000 or HD 4000 series cards (I assume yours is a 2000 series
> card) *BUT* the legacy driver does NOT support X server ABI 13 in the
> version of Xorg shipped with RHEL 6.4. So your card is not supported by
> AMD as the version of Xorg server in RHEL 6.4 is too new.

That's what I was coming to think - the one thing that had me stopped was
what it *was*. Do I understand you to be saying that this is a Radeon HD
2xxx (and why *three* names, two from ATI?)?

Also, it appears that you're saying I need to downgrade his X (all of
it?), and remove the kmod-fglrx, and install the legacy (is that the
kmod-fglrx93?

Thanks for the quick response - I really need to get his video up

  mark

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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/12/2013 5:33 PM, Bowie Bailey wrote:
> I had to replace the motherboard on one of my CentOS 4 systems and am
> now getting a kernel panic.
>
> When I try to boot up, I get this:
>
> Volume group "VolGroup00" not found
>   ERROR: /bin/lvm exited abnormally! (pid 448)
>   mount: error 6 mounting ext3
>   mount: error 2 mounting none
>   switchroot: mount failed: 22
>   umount /initrd/dev failed: 2
>   Kernel panic - not syncing: Attempted to kill init!
>
> (I apologize for any typos, I don't have a way to copy/paste from that
> screen)
>
> I can boot up with the boot CD, go into rescue mode and browse the
> files, so I know the drives are ok.
>
> I found some stuff online saying that I should recreate my initrd from
> rescue mode if the motherboard changed.  I tried this, but am still
> getting the same results.

Anyone have any ideas here?  I can rebuild the machine if I have to, but 
that's a last resort.

The old board was an ASUS A8N-VM CSM with the NVIDIA nForce 430 chipset.

The new board is an ASRock A785GM-LE board with the AMD SB710 chipset.

Thanks,

-- 
Bowie
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Re: [CentOS] upload a file to new github repository

[Adam Wead]

Nice.  Yeah, RITA.  Ugh.

Sorry I forgot the "git add ." part... that's pretty crucial!

FYI: for more info on using git, here's: http://gitimmersion.com/




Adam Wead
Systems and Digital Collections Librarian
Rock and Roll Hall of Fame and Museum
216.515.1960 (t)
215.515.1964 (f)


On Mon, Apr 15, 2013 at 12:20 PM, ken  wrote:

> Hey, fellow Cleveland dude!
>
> Thanks much.  That worked fine, though I did have to do a "git add"
> after adding file(s) in.  It got the files where they needed to go.
>
> You might have noticed another post here from me about it, but what I
> put out there was a gnumeric workbook I've been using for a long time to
> do my taxes-- Federal, state of Ohio, and local (which you as a
> Cleveland guy know as RITA).  So if you haven't done your taxes yet, it
> might help.  
>
> Thanks again.
>
> On 04/15/2013 11:23 AM Adam Wead wrote:
> > git clonehttps://git.com/username/my-repo
> > cd my-repo
> > [edit/add files]
> > git status # to preview your chnages
> > git commit -m"Adding new and changed files to my repo"
> > git push
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Re: [CentOS] New motherboard - kernel panic

[m . roth]

Bowie Bailey wrote:
> On 4/12/2013 5:33 PM, Bowie Bailey wrote:
>> I had to replace the motherboard on one of my CentOS 4 systems and am
>> now getting a kernel panic.
>>
>> When I try to boot up, I get this:
>>
>> Volume group "VolGroup00" not found
>>   ERROR: /bin/lvm exited abnormally! (pid 448)
>>   mount: error 6 mounting ext3
>>   mount: error 2 mounting none
>>   switchroot: mount failed: 22
>>   umount /initrd/dev failed: 2
>>   Kernel panic - not syncing: Attempted to kill init!
>>
>> (I apologize for any typos, I don't have a way to copy/paste from that
>> screen)
>>
>> I can boot up with the boot CD, go into rescue mode and browse the
>> files, so I know the drives are ok.
>>
>> I found some stuff online saying that I should recreate my initrd from
>> rescue mode if the motherboard changed.  I tried this, but am still
>> getting the same results.
>
> Anyone have any ideas here?  I can rebuild the machine if I have to, but
> that's a last resort.

Just sort of guessing - could the new m/b have resulted in a new UUID, and
the configuration - fstab? hwconf? - is looking for the old?

   mark "I like LABEL="

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Re: [CentOS] New motherboard - kernel panic

[m . roth]

Bowie Bailey wrote:
> On 4/12/2013 5:33 PM, Bowie Bailey wrote:
>> I had to replace the motherboard on one of my CentOS 4 systems and am
>> now getting a kernel panic.
>>
>> When I try to boot up, I get this:
>>
>> Volume group "VolGroup00" not found
>>   ERROR: /bin/lvm exited abnormally! (pid 448)
>>   mount: error 6 mounting ext3
>>   mount: error 2 mounting none
>>   switchroot: mount failed: 22
>>   umount /initrd/dev failed: 2
>>   Kernel panic - not syncing: Attempted to kill init!
>>
>> (I apologize for any typos, I don't have a way to copy/paste from that
>> screen)
>>
>> I can boot up with the boot CD, go into rescue mode and browse the
>> files, so I know the drives are ok.
>>
>> I found some stuff online saying that I should recreate my initrd from
>> rescue mode if the motherboard changed.  I tried this, but am still
>> getting the same results.
>
> Anyone have any ideas here?  I can rebuild the machine if I have to, but
> that's a last resort.

Sorry, hit  and had another thought: I think you said you rebuilt
the initrd... *could* you see the drives? *Did* the running system you
rebuilt from have all the LVM drivers loaded when you rebuilt it?

  mark

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Re: [CentOS] New motherboard - kernel panic

[Les Mikesell]

On Mon, Apr 15, 2013 at 12:35 PM,   wrote:

>>> I had to replace the motherboard on one of my CentOS 4 systems and am
>>> now getting a kernel panic.

CentOS 4 - seriously???

>>> I can boot up with the boot CD, go into rescue mode and browse the
>>> files, so I know the drives are ok.
>>>
>>> I found some stuff online saying that I should recreate my initrd from
>>> rescue mode if the motherboard changed.  I tried this, but am still
>>> getting the same results.
>>
>> Anyone have any ideas here?  I can rebuild the machine if I have to, but
>> that's a last resort.
>
> Sorry, hit  and had another thought: I think you said you rebuilt
> the initrd... *could* you see the drives? *Did* the running system you
> rebuilt from have all the LVM drivers loaded when you rebuilt it?

You need to include whatever drivers loaded in rescue mode in the new
initrd, but I've forgotten the exact details.  In Centos5 you would
add alias entries to /etc/modprobe.conf but it might have been named
something else in C4.   Maybe you can see what is there before you
chroot to the installed instance and change the file there to match,
then make the new initrd.   Once in a similar circumstance I just
copied the whole contents of ./boot from a different machine with
identical hardware so I didn't have to know as much as anaconda about
matching hardware and drivers.

--
   Les Mikesell
lesmikes...@gmail.com
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[CentOS] idea: "hybrid" iso images?

[Joseph Spenner]

In order to create a bootable CentOS installation USB thumb drive, there are 
several steps one must follow.  The process often involves using a Windows box, 
which can be kinda annoying.

The Linux Mint distro has what they call a "Hybrid" iso image.
 (see:   http://community.linuxmint.com/tutorial/view/744 )

This image can be written to a thumb drive and used for installation simply by 
performing:

# dd /path/to/image.iso of=/dev/sdb
  (where /dev/sdb is the thumb drive device).

This thumb drive can now be booted and used for installation.
The same image.iso file can be written to CD/DVD to create the installation 
media as well.


Is this a complicated ISO build process?  I'm frequently installing to systems 
without CD/DVD drives, so this would come in handy.

Thanks!

Regards,
Joseph Spenner

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[CentOS] CentOS 6.3 gpgv: Libgcrypt warning: missing initialization - please fix the application

[P J]

Howdy,

Seemingly randomly every day the following appears in /var/log/messages

gpgv: Libgcrypt warning: missing initialization - please fix the application
gpgv: Libgcrypt warning: missing initialization - please fix the application
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Re: [CentOS] CentOS 6.3 gpgv: Libgcrypt warning: missing initialization - please fix the application

[P J]

Ahh, premature send! My apologies.

Seemingly random times every day the following appears in /var/log/messages

gpgv: Libgcrypt warning: missing initialization - please fix the application
gpgv: Libgcrypt warning: missing initialization - please fix the application
--snip--

Anyone have any insight on what could be causing this and how to fix it?

locate gpgv
/usr/bin/gpgv
/usr/bin/gpgv2

rpm -qf /usr/bin/gpgv
gnupg2-2.0.14-4.el6.x86_64

rpm -qf /usr/bin/gpgv2
gnupg2-2.0.14-4.el6.x86_64

Thanks in advance!




On Mon, Apr 15, 2013 at 11:16 AM, P J  wrote:

> Howdy,
>
> Seemingly randomly every day the following appears in /var/log/messages
>
> gpgv: Libgcrypt warning: missing initialization - please fix the
> application
> gpgv: Libgcrypt warning: missing initialization - please fix the
> application
>
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Re: [CentOS] idea: "hybrid" iso images?

[Nux!]

On 15.04.2013 19:07, Joseph Spenner wrote:
> In order to create a bootable CentOS installation USB thumb drive,
> there are several steps one must follow.  The process often involves
> using a Windows box, which can be kinda annoying.
> 
> The Linux Mint distro has what they call a "Hybrid" iso image.
>  (see:   http://community.linuxmint.com/tutorial/view/744 )
> 
> This image can be written to a thumb drive and used for installation
> simply by performing:
> 
> # dd /path/to/image.iso of=/dev/sdb
>   (where /dev/sdb is the thumb drive device).
> 
> This thumb drive can now be booted and used for installation.
> The same image.iso file can be written to CD/DVD to create the
> installation media as well.
> 
> 
> Is this a complicated ISO build process?  I'm frequently installing
> to systems without CD/DVD drives, so this would come in handy.

Centos ISOs have been "hybrid" for a while now AFAIK. Have you tried 
them and did not work?

-- 
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Re: [CentOS] ATI video driver problems

[Ned Slider]

On 15/04/13 17:57, m.r...@5-cent.us wrote:
> Hi, Ned,
>
> Ned Slider wrote:
>> On 15/04/13 16:57, m.r...@5-cent.us wrote:
>>> User got upgraded to 6.4. Graphical mode video fails.
>>>
>>> It's an AMD (nee ATI) RV620 (FirePro 2260).
>>>
>>> So I finished upgrading everything, including kmod-fglrx. Based on the
>>> xorg.conf's on there, it's been using the fglrx. Now, in Xorg.0.log, it
>>> tells me "no supported AMD display adapters were found". I've been
>>> on-and-off googling for hours, and can't figure out if the "legacy"
>>> kmod-nvidia from elrepo will work: their info *ONLY* lists Radeon cards,
>>> and I can't figure out what this damn thing is. Oh, lspci -v tells me
>>> it's "ATI device 2343".
>>>
>>> Anyone know what this card is like (AMD shows three different models of
>>> the same name, and I have no idea which it is, and none uses a Radeon
>>> name), and what driver I might use, or do I have to downgrade X
>>
>> It is no longer supported.
>>
>> The current AMD driver [v13.1] ONLY supports Radeon HD 5000 series and
>> above, with the legacy driver [v13.1 legacy] supporting older Radeon HD
>> 2000, HD 3000 or HD 4000 series cards (I assume yours is a 2000 series
>> card) *BUT* the legacy driver does NOT support X server ABI 13 in the
>> version of Xorg shipped with RHEL 6.4. So your card is not supported by
>> AMD as the version of Xorg server in RHEL 6.4 is too new.
>
> That's what I was coming to think - the one thing that had me stopped was
> what it *was*. Do I understand you to be saying that this is a Radeon HD
> 2xxx (and why *three* names, two from ATI?)?
>

"FirePro 2260" leads me to believe it's a 2000 series card. Having the 
Vendor:Device ID pairing would help clarify, but looking at the pci id's 
database I'm guessing it's either 1002:95ce or 1002:95cf.

> Also, it appears that you're saying I need to downgrade his X (all of
> it?), and remove the kmod-fglrx, and install the legacy (is that the
> kmod-fglrx93?
>

You have a number of choices:

1. Use the v13.1 legacy driver from AMD and downgrade xorg\* to the last 
release that came with RHEL 6.3 and exclude future updates. If you wish 
to use the elrepo package it's called kmod-fglrx-legacy / 
fglrx-legacy-x11-drv (currently version 13.1-2) and is currently in the 
testing repo. Obviously downgrading xorg packages has potential security 
implications.

2. Uninstall the AMD proprietary drivers and use the distro kernel driver.

3. Ask AMD when they will update the legacy driver to support Xorg ABI 13.

4. Buy a new (supported) card.

A fifth option is to use el5 which uses an older supported version of 
Xorg (I do find it kind of ironic that RHEL6 ships with such a new 
version of Xorg that some proprietary drivers don't support it - more 
the kind of thing you expect to run into on Ubuntu or Fedora than 
Enterprise Linux).



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Re: [CentOS] Asterisk, IAXModem and Hylafax

[James B. Byrne]

On Mon, April 15, 2013 at 16:35:35 UTC, Tim Nelson tnelson at
rockbochs.com wrote:

> I've run into this quite often. Typically I just create a
> symlink to where the font data is, then rerun 'faxsetup'. Ex:
>
> ln -s /usr/share/ghostscript/8.70/lib /usr/share/ghostscript/fonts
>
> Then, all is well.
>
> Also, unrelated, ensure you disabled tokens in your Asterisk IAX
> config. Otherwise, iaxmodem will not register as it does not
> support tokens at this time.
>
> --Tim

Thank you.  After I wrote I checked in /etc/hylafax/hyla.conf and that
listed some of the directories where fonts are found in CentOS-6.3 and
many places where they are not. So I treated the error message from
faxsetup as spurious and proceeded on that basis.  I had already
encountered the difficulty with tokens and had set that to 'no' in the
fax device profiles.  (We are using the users and devices mode of
Asterisk rather than extensions.)

I can now register each of the two fax lines I have configured. Albeit
one at a time because I have only one spare POTS line to play with.
However, whenever I call in I only get the ss-noservice.ulaw
recording.  I assume that is specifically an asterisk question so I
will take to the Asterisk users list.

Thank you again for your help.





-- 
***  E-Mail is NOT a SECURE channel  ***
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Harte & Lyne Limited  http://www.harte-lyne.ca
9 Brockley Drive  vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/15/2013 1:33 PM, m.r...@5-cent.us wrote:
> Bowie Bailey wrote:
>> On 4/12/2013 5:33 PM, Bowie Bailey wrote:
>>> I had to replace the motherboard on one of my CentOS 4 systems and am
>>> now getting a kernel panic.
>>>
>>> When I try to boot up, I get this:
>>>
>>>  Volume group "VolGroup00" not found
>>>ERROR: /bin/lvm exited abnormally! (pid 448)
>>>mount: error 6 mounting ext3
>>>mount: error 2 mounting none
>>>switchroot: mount failed: 22
>>>umount /initrd/dev failed: 2
>>>Kernel panic - not syncing: Attempted to kill init!
>>>
>>> (I apologize for any typos, I don't have a way to copy/paste from that
>>> screen)
>>>
>>> I can boot up with the boot CD, go into rescue mode and browse the
>>> files, so I know the drives are ok.
>>>
>>> I found some stuff online saying that I should recreate my initrd from
>>> rescue mode if the motherboard changed.  I tried this, but am still
>>> getting the same results.
>> Anyone have any ideas here?  I can rebuild the machine if I have to, but
>> that's a last resort.
> Just sort of guessing - could the new m/b have resulted in a new UUID, and
> the configuration - fstab? hwconf? - is looking for the old?

The drives are in an md array (raid 1) which is used as the PV for the 
volume group that is producing the error.  fstab simply references the 
logical volume.  LVM configuration refers to /dev/md1.  mdadm.conf 
simply says "device partitions".  I can't go any farther than that 
without a running system.

-- 
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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/15/2013 1:35 PM, m.r...@5-cent.us wrote:
> Bowie Bailey wrote:
>> On 4/12/2013 5:33 PM, Bowie Bailey wrote:
>>> I had to replace the motherboard on one of my CentOS 4 systems and am
>>> now getting a kernel panic.
>>>
>>> When I try to boot up, I get this:
>>>
>>>  Volume group "VolGroup00" not found
>>>ERROR: /bin/lvm exited abnormally! (pid 448)
>>>mount: error 6 mounting ext3
>>>mount: error 2 mounting none
>>>switchroot: mount failed: 22
>>>umount /initrd/dev failed: 2
>>>Kernel panic - not syncing: Attempted to kill init!
>>>
>>> (I apologize for any typos, I don't have a way to copy/paste from that
>>> screen)
>>>
>>> I can boot up with the boot CD, go into rescue mode and browse the
>>> files, so I know the drives are ok.
>>>
>>> I found some stuff online saying that I should recreate my initrd from
>>> rescue mode if the motherboard changed.  I tried this, but am still
>>> getting the same results.
>> Anyone have any ideas here?  I can rebuild the machine if I have to, but
>> that's a last resort.
> Sorry, hit  and had another thought: I think you said you rebuilt
> the initrd... *could* you see the drives? *Did* the running system you
> rebuilt from have all the LVM drivers loaded when you rebuilt it?

I can see the drives from the rescue environment.  I don't know how to 
check the LVM drivers.

-- 
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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/15/2013 1:44 PM, Les Mikesell wrote:
> On Mon, Apr 15, 2013 at 12:35 PM,   wrote:
>
 I had to replace the motherboard on one of my CentOS 4 systems and am
 now getting a kernel panic.
> CentOS 4 - seriously???

Yea, it's an old system.

>
 I can boot up with the boot CD, go into rescue mode and browse the
 files, so I know the drives are ok.

 I found some stuff online saying that I should recreate my initrd from
 rescue mode if the motherboard changed.  I tried this, but am still
 getting the same results.
>>> Anyone have any ideas here?  I can rebuild the machine if I have to, but
>>> that's a last resort.
>> Sorry, hit  and had another thought: I think you said you rebuilt
>> the initrd... *could* you see the drives? *Did* the running system you
>> rebuilt from have all the LVM drivers loaded when you rebuilt it?
> You need to include whatever drivers loaded in rescue mode in the new
> initrd, but I've forgotten the exact details.  In Centos5 you would
> add alias entries to /etc/modprobe.conf but it might have been named
> something else in C4.   Maybe you can see what is there before you
> chroot to the installed instance and change the file there to match,
> then make the new initrd.   Once in a similar circumstance I just
> copied the whole contents of ./boot from a different machine with
> identical hardware so I didn't have to know as much as anaconda about
> matching hardware and drivers.

There is a /etc/modprobe.conf file on the original system.  Among other 
things, it says:

alias scsi_hostadapter sata_nv

I assume that refers to the driver for the nvidia chipset.

I found a modprobe.conf file in the rescue environment living in 
/tmp/modprobe.conf.  This one says:

alias scsi_hostadapter ahci

I guess that's a driver that works with the new hardware?  I do not have 
the ports in ahci mode in the bios.

What do I need to do to make sure the driver gets into initrd?  Or do I 
just need to make the change to /etc/modprobe.conf on the hard drive?

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Re: [CentOS] New motherboard - kernel panic

[Les Mikesell]

On Mon, Apr 15, 2013 at 1:54 PM, Bowie Bailey  wrote:
>
>> CentOS 4 - seriously???
>
> Yea, it's an old system.

If you have somewhere to copy the data,  the best approach would be to
back it up from the rescue-mode boot, reinstall centos 6 and copy back
anything you need - and be good for another many years.

> There is a /etc/modprobe.conf file on the original system.  Among other
> things, it says:
>
> alias scsi_hostadapter sata_nv
>
> I assume that refers to the driver for the nvidia chipset.
>
> I found a modprobe.conf file in the rescue environment living in
> /tmp/modprobe.conf.  This one says:
>
> alias scsi_hostadapter ahci
>
> I guess that's a driver that works with the new hardware?  I do not have
> the ports in ahci mode in the bios.

lsmod from the running rescue system should show the loaded modules.
Your initrd has to include anything needed to access the hard drive
and filesystem before you can find the others.

> What do I need to do to make sure the driver gets into initrd?  Or do I
> just need to make the change to /etc/modprobe.conf on the hard drive?

I think you would change the /etc/modprobe.conf on the hard drive and
chroot there (/mnt/sysimage) before running mkinitrd.

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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/15/2013 3:10 PM, Les Mikesell wrote:
> On Mon, Apr 15, 2013 at 1:54 PM, Bowie Bailey  wrote:
>>> CentOS 4 - seriously???
>> Yea, it's an old system.
> If you have somewhere to copy the data,  the best approach would be to
> back it up from the rescue-mode boot, reinstall centos 6 and copy back
> anything you need - and be good for another many years.

This system is running BackupPC.  The number of hardlinks in the data 
makes copying impractical.  I may rebuild it with CentOS 6 later and let 
the backups rebuild themselves, but I don't want to do it now if I can 
avoid it.

>
>> There is a /etc/modprobe.conf file on the original system.  Among other
>> things, it says:
>>
>> alias scsi_hostadapter sata_nv
>>
>> I assume that refers to the driver for the nvidia chipset.
>>
>> I found a modprobe.conf file in the rescue environment living in
>> /tmp/modprobe.conf.  This one says:
>>
>> alias scsi_hostadapter ahci
>>
>> I guess that's a driver that works with the new hardware?  I do not have
>> the ports in ahci mode in the bios.
> lsmod from the running rescue system should show the loaded modules.
> Your initrd has to include anything needed to access the hard drive
> and filesystem before you can find the others.
>
>> What do I need to do to make sure the driver gets into initrd?  Or do I
>> just need to make the change to /etc/modprobe.conf on the hard drive?
> I think you would change the /etc/modprobe.conf on the hard drive and
> chroot there (/mnt/sysimage) before running mkinitrd.

I figured that one out just before I received your response.  That fixed 
the bootup problem.  The changes to modprobe.conf were what was missing 
from the instructions I found online on Friday.

For future reference, this is what I did:

1) Boot into rescue mode.
2) Look at /tmp/modprobe.conf in the rescue environment to see what 
driver was in use.
3) Edit /mnt/sysimage/etc/modprobe.conf and add the driver there
4) chroot /mnt/sysimage
5) cd /boot
6) mv initrd-(kernel version).img initrd-(kernel version).img.bkup
7) mkinitrd initrd-(kernel version).img (kernel version)
8) reboot

Now I've just got to work on getting the network card going, but that (I 
hope!) should be much easier now that the system is booting.

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[CentOS] My linux keeps logging me off when I run Firefox (how to debug)?

[Rock]

This is a strange one to me.

Just recently, my Centos 6 has been "gentle crashing" where it doesn't crash, 
per se, but the screen goes black, and the login prompt pops up. 

It only happens when I run Firefox and it only started happening this morning.
However, it has happened a dozen times, and always when Firefox is running.

It does NOT happen when Firefox is not running. 
I haven't tested with Chrome yet; so that's my next test - but - the 
question I have is:

How do I log the events that are causing Centos to log me out of 
user1 and to present the login screen?


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Re: [CentOS] My linux keeps logging me off when I run Firefox (how to debug)?

[Frank Cox]

On Mon, 15 Apr 2013 19:29:05 + (UTC)
Rock wrote:

> Just recently, my Centos 6 has been "gentle crashing" where it doesn't crash, 
> per se, but the screen goes black, and the login prompt pops up. 
> 
> It only happens when I run Firefox and it only started happening this morning.
> However, it has happened a dozen times, and always when Firefox is running.

Your desktop is crashing, not the entire machine.

Try renaming ~/.mozilla to something else, then run firefox and see if it still
crashes.

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Re: [CentOS] idea: "hybrid" iso images?

[Joseph Spenner]

>



 > From: Nux! 
> To: CentOS mailing list  
> Sent: Monday, April 15, 2013 11:26 AM
>Subject: Re: [CentOS] idea:  "hybrid" iso images?
 
>
>On 15.04.2013 19:07, Joseph Spenner wrote:
>> In order to create a bootable CentOS installation USB thumb drive,
>> there are several steps one must follow.  The process often involves
>> using a Windows box, which can be kinda annoying.
>> 
>> The Linux Mint distro has what they call a "Hybrid" iso image.
>>  (see:   http://community.linuxmint.com/tutorial/view/744 )
>> 
>> This image can be written to a thumb drive and used for installation
>> simply by performing:
>> 
>> # dd /path/to/image.iso of=/dev/sdb
>>   (where /dev/sdb is the thumb drive device).
>> 
>> This thumb drive can now be booted and used for installation.
>> The same image.iso file can be written to CD/DVD to create the
>> installation media as well.
>> 
>> 
>> Is this a complicated ISO build process?  I'm frequently installing
>> to systems without CD/DVD drives, so this would come in handy.

> Centos ISOs have been "hybrid" for a while now AFAIK. Have you tried 
> them and did not work?

=

Nux:
 
 I just tried again, using an 8G thumb drive, with the 
CentOS-6.4-x86_64-minimal.iso image on my 64bit Dell laptop, and got a 
quick error:
   "no boot sector found on USB device"
  It then proceeded to boot the next device in the boot order list.
  I also tried it on 2 other Dell servers, and neither would boot the thumb 
drive.

I then dd'd the latest Linux Mint iso to the same thumb drive, and it worked 
fine on my laptop.
So, perhaps the CentOS images can not (yet) be used this way.
Have you tried?

Thanks for the reply!

Regards,
Joseph Spenner

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Re: [CentOS] ATI video driver problems

[m . roth]

Ned Slider wrote:
> On 15/04/13 17:57, m.r...@5-cent.us wrote:
>> Ned Slider wrote:
>>> On 15/04/13 16:57, m.r...@5-cent.us wrote:
 User got upgraded to 6.4. Graphical mode video fails.

 It's an AMD (nee ATI) RV620 (FirePro 2260).

 So I finished upgrading everything, including kmod-fglrx. Based on the
 xorg.conf's on there, it's been using the fglrx. Now, in Xorg.0.log,
 it tells me "no supported AMD display adapters were found". I've been
 on-and-off googling for hours, and can't figure out if the "legacy"
 kmod-nvidia from elrepo will work: their info *ONLY* lists Radeon
 cards,
 and I can't figure out what this damn thing is. Oh, lspci -v tells me
 it's "ATI device 2343".

> "FirePro 2260" leads me to believe it's a 2000 series card. Having the
> Vendor:Device ID pairing would help clarify, but looking at the pci id's
> database I'm guessing it's either 1002:95ce or 1002:95cf.

Not sure how to get that - lspci -vvv | grep 1002 gets me nothing.
>
>> Also, it appears that you're saying I need to downgrade his X (all of
>> it?), and remove the kmod-fglrx, and install the legacy (is that the
>> kmod-fglrx93?
>
> You have a number of choices:
>
> 1. Use the v13.1 legacy driver from AMD and downgrade xorg\* to the last
> release that came with RHEL 6.3 and exclude future updates. If you wish
> to use the elrepo package it's called kmod-fglrx-legacy /
> fglrx-legacy-x11-drv (currently version 13.1-2) and is currently in the
> testing repo. Obviously downgrading xorg packages has potential security
> implications.

That's become a no-starter: I tried to downgrade, and yum tells me there
*is* no downgrade. If I understand correctly... I'd have to downgrade him
to 6.3.
>
> 2. Uninstall the AMD proprietary drivers and use the distro kernel driver.
>
> 3. Ask AMD when they will update the legacy driver to support Xorg ABI 13.

See the last sentence in my answer to 4.
>
> 4. Buy a new (supported) card.

That's try and get it through purchasing, or maybe I can try the unlikely
idea, since it's still under warranty (we just bought it in Nov!), to see
if Dell will replace the card.  I have a call into them, and am waiting
for the RH group there to get back to me, to see if they have a driver
(and maybe lean on them to lean on AMD - Dell leans a *lot* harder than I
do).
>
> A fifth option is to use el5 which uses an older supported version of
> Xorg (I do find it kind of ironic that RHEL6 ships with such a new
> version of Xorg that some proprietary drivers don't support it - more
> the kind of thing you expect to run into on Ubuntu or Fedora than
> Enterprise Linux).
>
I don't think I'm going to rebuild his entire system that way. 6.3 would
work, but I'm seeing what I can do to avoid that.


I've got it working with radeon. What I've spent an hour or two on is
hand-crafting an xorg.conf. He's got two monitors, and rotates them
(*sigh*). Everything seems right, except for one detail: I can't drag the
mouse from one screen to the next. I have Option "Xinerama" "1", but no
joy.

Clues?

mark "almost there"
I've been

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Re: [CentOS] New motherboard - kernel panic

[m . roth]

Bowie Bailey wrote:
> On 4/15/2013 1:35 PM, m.r...@5-cent.us wrote:
>> Bowie Bailey wrote:
>>> On 4/12/2013 5:33 PM, Bowie Bailey wrote:
 I had to replace the motherboard on one of my CentOS 4 systems and am
 now getting a kernel panic.

 When I try to boot up, I get this:

  Volume group "VolGroup00" not found
ERROR: /bin/lvm exited abnormally! (pid 448)
mount: error 6 mounting ext3
mount: error 2 mounting none
switchroot: mount failed: 22
umount /initrd/dev failed: 2
Kernel panic - not syncing: Attempted to kill init!

 (I apologize for any typos, I don't have a way to copy/paste from that
 screen)

 I can boot up with the boot CD, go into rescue mode and browse the
 files, so I know the drives are ok.

 I found some stuff online saying that I should recreate my initrd from
 rescue mode if the motherboard changed.  I tried this, but am still
 getting the same results.

>> Sorry, hit  and had another thought: I think you said you rebuilt
>> the initrd... *could* you see the drives? *Did* the running system you
>> rebuilt from have all the LVM drivers loaded when you rebuilt it?
>
> I can see the drives from the rescue environment.  I don't know how to
> check the LVM drivers.

You need *both* the md drivers and lvm drivers. I haven't built a system
using lvm in years, I'm afraid, but it shouldn't be too hard.

Btw, this may be of some interest:


  mark

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Re: [CentOS] ATI video driver problems

[Nicolas Thierry-Mieg]

m.r...@5-cent.us wrote:
> Ned Slider wrote:
>> On 15/04/13 17:57, m.r...@5-cent.us wrote:
>>> Ned Slider wrote:
 On 15/04/13 16:57, m.r...@5-cent.us wrote:
> User got upgraded to 6.4. Graphical mode video fails.
>
> It's an AMD (nee ATI) RV620 (FirePro 2260).
>
> So I finished upgrading everything, including kmod-fglrx. Based on the
> xorg.conf's on there, it's been using the fglrx. Now, in Xorg.0.log,
> it tells me "no supported AMD display adapters were found". I've been
> on-and-off googling for hours, and can't figure out if the "legacy"
> kmod-nvidia from elrepo will work: their info *ONLY* lists Radeon
> cards,
> and I can't figure out what this damn thing is. Oh, lspci -v tells me
> it's "ATI device 2343".
>
>> "FirePro 2260" leads me to believe it's a 2000 series card. Having the
>> Vendor:Device ID pairing would help clarify, but looking at the pci id's
>> database I'm guessing it's either 1002:95ce or 1002:95cf.
>
> Not sure how to get that - lspci -vvv | grep 1002 gets me nothing.

google is your friend, and you don't have to go through many pages of 
hits for that one:
http://lmgtfy.com/?q=Vendor%3ADevice+ID+pairing&l=1


>>> Also, it appears that you're saying I need to downgrade his X (all of
>>> it?), and remove the kmod-fglrx, and install the legacy (is that the
>>> kmod-fglrx93?
>>
>> You have a number of choices:
>>
>> 1. Use the v13.1 legacy driver from AMD and downgrade xorg\* to the last
>> release that came with RHEL 6.3 and exclude future updates. If you wish
>> to use the elrepo package it's called kmod-fglrx-legacy /
>> fglrx-legacy-x11-drv (currently version 13.1-2) and is currently in the
>> testing repo. Obviously downgrading xorg packages has potential security
>> implications.
>
> That's become a no-starter: I tried to downgrade, and yum tells me there
> *is* no downgrade. If I understand correctly... I'd have to downgrade him
> to 6.3.

no.
only xorg and friends as Ned told you... you *will* have to do some repo 
configuring to do that, though. I'm sure google can help you there too.

that part of your email is probably irrelevant if you got it working 
with the radeon driver, but for the record...
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Re: [CentOS] CentOS 6.3 gpgv: Libgcrypt warning: missing initialization - please fix the application

[P J]

If it helps, I figured out the application causing the error message.
It's Ksplice's uptrace-upgrade which runs via cron...

Still not sure what the solution is, or if this error is benign.


On Mon, Apr 15, 2013 at 11:18 AM, P J  wrote:

> Ahh, premature send! My apologies.
>
> Seemingly random times every day the following appears in /var/log/messages
>
> gpgv: Libgcrypt warning: missing initialization - please fix the
> application
> gpgv: Libgcrypt warning: missing initialization - please fix the
> application
> --snip--
>
> Anyone have any insight on what could be causing this and how to fix it?
>
> locate gpgv
> /usr/bin/gpgv
> /usr/bin/gpgv2
>
> rpm -qf /usr/bin/gpgv
> gnupg2-2.0.14-4.el6.x86_64
>
> rpm -qf /usr/bin/gpgv2
> gnupg2-2.0.14-4.el6.x86_64
>
> Thanks in advance!
>
>
>
>
> On Mon, Apr 15, 2013 at 11:16 AM, P J  wrote:
>
>> Howdy,
>>
>> Seemingly randomly every day the following appears in /var/log/messages
>>
>> gpgv: Libgcrypt warning: missing initialization - please fix the
>> application
>> gpgv: Libgcrypt warning: missing initialization - please fix the
>> application
>>
>
>
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Re: [CentOS] No more support for chrome/chromium on rhel6

[Johnny Hughes]

On 04/15/2013 01:26 AM, Robert Arkiletian wrote:
> Is there any chance CentOS might add Chromium to extras repo? See below.
>
> Post from Hirakendu:
> https://groups.google.com/a/chromium.org/forum/?fromgroups#!topic/chromium-discuss/I_ZFDJqdiyA
>
> ---
> "I have put up some scripts for building current Chromium versions (26
> and 27) on EL 6 at
>
> https://github.com/hirakendu/chromium_el_builder
>
> . See the readme for details. Due to the large file size, the current
> RPM chromium-26.0.1410.63-192696.x86_64.rpm, built on CentOS 6.4, can
> be obtained by downloading the project archive.Please note that this
> is only for the time being and I do not intend to actively maintain
> it, but I hope it may help others. A couple of patches may be merged
> as well.
>
> Aside, thanks to Paweł for maintaining the excellent chromium ebuilds
> for Gentoo Linux (which I have been happily using for several years)
> that helped clarify some of the build steps, in addition to the
> official build instructions at chromium.org."

I will be glad to build it, *IF* I can reproduce what the script does
inside an SRPM (looks like I should be able to).  One of our rules is an
SRPM for everything we release.

The problem is, if he is not going to support it later, his gcc patches
may not keep working on newer code and we only gain a couple of builds
and run out of support.

Since I personally use chrome as my browser (and obviously CentOS-6.4 as
my OS :D) ... and want to continue to do so ... I will look at this soon.

Thanks,
Johnny Hughes



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Re: [CentOS] My linux keeps logging me off when I run Firefox (how to debug)?

[Fred Smith]

On Mon, Apr 15, 2013 at 07:29:05PM +, Rock wrote:
> This is a strange one to me.
> 
> Just recently, my Centos 6 has been "gentle crashing" where it doesn't crash, 
> per se, but the screen goes black, and the login prompt pops up. 
> 
> It only happens when I run Firefox and it only started happening this morning.
> However, it has happened a dozen times, and always when Firefox is running.
> 
> It does NOT happen when Firefox is not running. 
> I haven't tested with Chrome yet; so that's my next test - but - the 
> question I have is:
> 
> How do I log the events that are causing Centos to log me out of 
> user1 and to present the login screen?

Do you have an NVIDIA graphics card?

if yes, are you using the driver package directly from NVIDIA (as
opposed to onoe of the RPM versions from, e.g., epel, or wherever...

I've had what you describe happen to me under those circumstances.
The nvidia drivers replace some system library, and now and then
(not too often, in my experience, in fact pretty rarely) that system
lib gets updated, threby trashing the Nvidia replacement.

When that happens, firing up firefox will kill X, dropping you back
to the login.

if that sounds like what you see, just go rerun the nvidia installer,
then you should be working again.

-- 
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Do you not know? Have you not heard? 
The LORD is the everlasting God, the Creator of the ends of the earth. 
  He will not grow tired or weary, and his understanding no one can fathom.
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[CentOS] Regarding : ATI video driver problems

[Mark LaPierre]

I gather from the discussion on the reference thread that I'll be having 
quite a time with a MB having an Integrated ATI Radeon HD 3000 graphics 
chip set and a video card using a Radeon HD 6570 chip set when I try to 
run CentOS 6.4 on it.

I was going to ask if CrossFire works with CentOS, but it appears that 
the integrated chip set isn't going to work at all.

Well, ignoring all that, is CrossFire supported by any of the drivers 
available for CentOS 6.4?  If no then what about SLI support?  I don't 
want to paint myself into a corner by building a computer that I'll 
never get working to full potential.

Anyway, here's my wish list as it stands at the moment.

Brand   Model_Num
Mother BoardGIGABYTEGA-78LMT-USB3
Processor   AMD FX-8150
CPU Cooler  
CaseCooler Master   HAF 912 RC-912-KKN1
Power SupplyCooler Master   RS650-ACAAE3-US
Memory  CORSAIR CMX32GX3M4A1333C9
DVD Burner  Lite-On IHAS324-98
Hard Drive  Seagate ST1000DM003
Video Card  GIGABYTEGV-R657OC-1GI

Feel free to suggest changes that might make compatibility less of an 
issue.  I chose the MB because it supports 32G of RAM and also has a 
parallel port that I need to support my laser printer.  I suppose I 
could use a parallel port interface card with another MB instead.

-- 
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°v°
   /(_)\
^ ^  Mark LaPierre
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Re: [CentOS] My linux keeps logging me off when I run Firefox (how to debug)?

[Rock]

On Mon, 15 Apr 2013 13:38:27 -0600, Frank Cox wrote:

> Your desktop is crashing, not the entire machine.
> 
> Try renaming ~/.mozilla to something else, then run firefox and see if it 
> still
> crashes.

Ah, that makes sense that the "os" isn't crashing, 
but that the "Desktop" is.

I tried with Chrome, and, guess what? No crash.

Then I uninstalled Firefox & the Tor Browser Bundle (TBB), 
both of which use Firefox, and I removed the ~/.mozilla directory.
$ sudo yum remove firefox

I re-installed Firefox, and it crashed the desktop again:
$ sudo yum install firefox

So, now I'm using Chrome (but I prefer Firefox). 
I must admit I had Firefox honed for protection, with noscript, 
ghostery, user-agent switcher, dns-flusher, etc.

So, maybe those addons were causing the problem (but I did not
 add anything recently). 

QUESTION:
 Is there a Desktop crash log somewhere?


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Re: [CentOS] My linux keeps logging me off when I run Firefox (how to debug)?

[Rock]

On Mon, 15 Apr 2013 19:07:46 -0400, Fred Smith wrote:

> Do you have an NVIDIA graphics card?

Yes, I do. 
And, come to think of it, I "did" recently run a "yum update".

Maybe the El Repo Nvidia driver has a problem with Firefox?

I remember it was miserable installing the Nvidia driver a
while ago...

Looking at my log file, here's how I had installed the Nvidia
driver from the El Repo repository:

1. I identified my kernel version:
   $ uname -r
   ==> 2.6.32-279.5.1.el6.x86_64

2. I identified my graphics card
   $ /sbin/lspci -nn | grep VGA
   ==>01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GT216 
[Quadro FX 880M] [10de:0a3c] (rev a2)

3. I identified the latest version of the graphics driver available:
   http://www.nvidia.com/object/linux-display-amd64-304.37-driver.html
   Note: I compared this latest version & support information with the 
 latest available at El Repo in the next step.

4. I compared the Nvidia version with the latest available El Repo version:
   http://elrepo.org/tiki/Driver+Versions
   Note: I searched for "nvidia" to find the latest version to be "nvidia 
295.40".

5. I enabled the El Repo repository:
   $ sudo rpm --import http://elrepo.org/RPM-GPG-KEY-elrepo.org
   $ sudo rpm -Uvh http://elrepo.org/elrepo-release-6-4.el6.elrepo.noarch.rpm

5. I installed the latest Nvidia driver from the El Repo repository:
   $ sudo yum --enablerepo elrepo install kmod-nvidia
   $ sudo yum --disablerepo=\* --enablerepo=elrepo install nvidia-x11-drv-32bit

> if yes, are you using the driver package directly from NVIDIA (as
> opposed to one of the RPM versions from, e.g., epel, or wherever...

I'm using the one from El Repo.
 
> I've had what you describe happen to me under those circumstances.
> The nvidia drivers replace some system library, and now and then
> (not too often, in my experience, in fact pretty rarely) that system
> lib gets updated, threby trashing the Nvidia replacement.

Come to think of it, I 'did' recently run a "yum update"!

> When that happens, firing up firefox will kill X, dropping 
> you back to the login.
> 
> if that sounds like what you see, just go rerun the nvidia installer,
> then you should be working again.

So, you suggest I install the Nvidia drivers directly from Nvidia
and not the Nvidia drivers from the El Repo repository?

Note: I'm not sure I know how to do that.


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Re: [CentOS] My linux keeps logging me off when I run Firefox (how to debug)?

[Robert]

On Tue, 16 Apr 2013 00:30:15 + (UTC)
Rock  wrote:

> So, you suggest I install the Nvidia drivers directly from Nvidia
> and not the Nvidia drivers from the El Repo repository?
> 
> Note: I'm not sure I know how to do that.

I too would suggest that you install the Nvidia drivers from the Nvidia site.  
That is what I do.
You will need to install the kernel headers in order to install the drivers 
from Nvidia site.

Then make the Nvidia driver executable and run it.  Follow the instruction, 
which are not much and you good to go.  Also be aware every time you
upgrade the kernel you are going to have to install the driver new again.



--  
Regards
Robert

Linux
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Re: [CentOS] Apache Issue on CentOS 6

[linuxsupport]

Anyone got any idea?


On Mon, Apr 8, 2013 at 11:14 AM, linuxsupport  wrote:

> I was not able to reproduce it while sending so many requests from ab or
> any other tool, it only appears when requests come from browser, I had
> posted this question to Apache users as well and someone told that it is
> due to Chrome uses preconnection, though this feature was available on
> Chrome since version 7, till kernel version 2.6.31.14 these preconnection
> requests were not coming to Apache status page but from 2.6.32 they started
> appearing on Apache status.
>
> Following thread also talks about preconnection
> https://code.google.com/p/chromium/issues/detail?id=85229
>
>
>
> On Mon, Apr 8, 2013 at 10:37 AM, Banyan He  wrote:
>
>>  Yes, they do because I'm using slow access to attack my servers. To
>> your environment, you can use tcpdump to capture one connection to check if
>> it's the slow access attack.
>>
>> If it's an attack, we focus on fixing that part. If it's the code
>> problem, then, we can get back to the httpd daemon checking what it goes
>> wrong.
>>
>> 
>> Banyan He
>> Blog: http://www.rootong.com
>> Email: ban...@rootong.com
>>
>> On 4/8/2013 1:03 PM, linuxsupport wrote:
>>
>> your both el5 and el6 Apache status show lots of R -- Reading
>>
>>
>> On Mon, Apr 8, 2013 at 10:24 AM, Banyan He  wrote:
>>
>>>  I did a quick test on el5 and el6 with these package,
>>>
>>> httpd-2.2.3-43.el5.centos
>>> httpd-2.2.15-15.el6.centos.1.i686
>>>
>>> I kept the configuration as what it is in default. The index page is
>>> about 7k, 100 connections per second. I barely find the connection is
>>> marked as R. Mostly C and _. This is done by ab from httpd.
>>>
>>> I also did a quick test with slow attack. It's basically slowing the
>>> client itself to collect the data from the server. I did 200 connections
>>> per second. My server is ok seems. A little bit slow, but not too much.
>>>
>>> el5
>>>
>>> 
>>> 
>>> 
>>> CWS.
>>>
>>> el6
>>>
>>> 
>>> 
>>> 
>>> RRRCCCCRWCWCCWWCCC..
>>>
>>>
>>> I also did the capture on the network traffic that I can find out the
>>> connections are doing something bad. You may follow the lead here as I
>>> mentioned.
>>>
>>>
>>>
>>> 
>>> Banyan He
>>> Blog: http://www.rootong.com
>>> Email: ban...@rootong.com
>>>
>>>   On 4/7/2013 12:23 AM, linuxsupport wrote:
>>>
>>> There is no problem with the hardware, If I installed CentOS 5 then it
>>> works well, at a time out of total 44 concurrent requests 34 were in
>>> reading state
>>>
>>>
>>>  On Sat, Apr 6, 2013 at 2:03 PM, Banyan He  wrote:
>>>
  I went to the source code to check this. Seems like it's used for
 against the slow request attack from the rate. There is a timeout and rate
 set for header and body.

 I'd keep that thought, capture one connection from tcpdump seeing if
 they are doing something bad. If not, you seem need a new server balancing
 the traffic.

 
 Banyan He
 Blog: http://www.rootong.com
 Email: ban...@rootong.com

   On 4/6/2013 3:06 PM, linuxsupport wrote:

  I have already checked but all requests are from different IP's and
 even different subnet
  When there are less requests it works ok even if there are more than
 60% reading requests but during peak time when concurrent requests goes
 beyond 150, due to reading requests it becomes 300+ requests processing at
 the same time and that then Apache stop responding as maxclient is set to
 300. CPU load also goes up and thing become very slow.


 On Sat, Apr 6, 2013 at 10:33 AM, Banyan He  wrote:

> I'd recommend you to sort out the connections. Find out if they are
> coming from the same client or the same subnet of the clients. Doing a
> simple tcpdump capture to analyze the data seeing if it's a good R or a 
> bad
> R.
>
> Don't really think it's because of the version.
>
> 
> Banyan He
> Blog: http://www.rootong.com
> Email: ban...@rootong.com
>
>
> On 4/6/2013 12:24 PM, linuxsupport wrote:
>
>>  I am facing a problem with Apache on CentOS 6
>>
>> Apache 2.2.19 is complied from source.
>>
>> I see so many reading requests in Apache status page, as per my
>> previous
>> experience this "reading request" issue mainly comes when any of the
>> internet route having any problem and it request takes time to
>> completely
>> reach to Ap

Re: [CentOS] My linux keeps logging me off when I run Firefox (how to debug)?

[Rock]

On Tue, 16 Apr 2013 00:21:33 +, Rock wrote:

>  Is there a Desktop crash log somewhere?

Given that the advice was that X was crashing due to Nvidia 
driver mismatch problems after my "yum update", I took a look
at the ~/.xsession-errors log file before and after the crash.

And, you seem to be correct: The xsession is crashing when
using Firefox (but not Chrome):

Window manager warning: Fatal IO error 11 (Resource temporarily unavailable) on 
display ':0'.
nautilus: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.
polkit-gnome-authentication-agent-1: Fatal IO error 11 (Resource temporarily 
unavailable) on X server :0.
nm-applet: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.
rhythmbox: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.
gpk-update-icon: Fatal IO error 11 (Resource temporarily unavailable) on X 
server :0.
pan: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.0.
gnome-screensaver: Fatal IO error 11 (Resource temporarily unavailable) on X 
server :0.
gdu-notification-daemon: Fatal IO error 11 (Resource temporarily unavailable) 
on X server :0.
gnome-terminal: Fatal IO error 104 (Connection reset by peer) on X server :0.0.
[14555:14555:0415/175602:ERROR:chrome_browser_main_x11.cc(62)] X IO error 
received (X server probably went away)


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Re: [CentOS] My linux keeps logging me off when I run Firefox (how to debug)?

[Rock]

On Mon, 15 Apr 2013 20:50:12 -0400, Robert wrote:

> I too would suggest that you install the Nvidia 
> drivers from the Nvidia site.  That is what I do.
> You will need to install the kernel headers in order 
> to install the drivers from Nvidia site.

Thanks for the advice to install the Nvidia drivers.

I'm just about to reboot, so, before I forget the 
details, here's my log file, sufficient for the 
next person to follow (including myself) in the future:

I had to re-install Firefox to prove that the desktop was crashing:
$ sudo yum install firefox
==> firefox.x86_64 0:17.0.5-1.el6.centos

I cleared the ~/.xsession-errors file so that I could start fresh:
$ mv ~/.xsession-errors /tmp/xsession_before

I rebooted so as to start a fresh xsession:
$ sudo reboot

I ran Firefox until the Desktop crashes again:
$ firefox (it didn't take long for the Desktop to crash)

I logged back into the Desktop and compared the xsession logs:
$ cp ~/.xsession-errors /tmp/xsession_after
$ diff /tmp/xsession_before /tmp/xsession_after
Found lots of stuff, for example:
==> Window manager warning: Fatal IO error 11 (Resource temporarily unavailable)
==> nautilus: Fatal IO error 11 (Resource temporarily unavailable) on X server 
:0.
etc.

So, it's now time to update the graphics card driver.

Identify your kernel:
$ uname -r
  ==> 2.6.32-358.2.1.el6.x86_64

Identify your graphics card:
$ /sbin/lspci -nn | grep VGA
  ==> 01:00.0 VGA compatible controller [0300]: 
  NVIDIA Corporation GT216 [Quadro FX 880M] [10de:0a3c] (rev a2)

Identify the installed version of Nvidia drivers:
$ $ sudo updatedb; locate libvdpau_nvidia.so
  ==> /usr/lib/vdpau/libvdpau_nvidia.so.304.37
  ==> /usr/lib64/vdpau/libvdpau_nvidia.so.304.37

Go to Nvidia support:
  http://www.nvidia.com/page/support.html 

Press on "Download Drivers" (that brings you to):
  http://www.nvidia.com/Download/.aspx?lang=en-us

Enter the following information:
 - Product Type: Quadro
 - Product Series: Quadro FX Series (Notebooks) <== important to get right! 
 - Product: Quadro FX 880M
 - Operating System: Linux 64-bit
 - Download Type: Linux Long Lived Driver
 - Language: English (US)
 Press the "Search" button (that brings you to):
 ==> http://www.nvidia.com/object/linux-display-amd64-310.44-driver.html
 - Version: 310.44
 - Release Date: 2013.04.02
 - Operating System: Linux 64-bit
 - Language: English (U.S.)
 - File Size: 65.2 MB
 Press the "Download" button (save the file but don't install it).

Compare the Nvidia version with the version at the El Repo repository:
   http://elrepo.org/tiki/Driver+Versions
   Search for "nvidia" to find the latest version, which is:
   - Kmod Package: nvidia
   - ElRepo Kmod Version: 310.44

Since the El Repo version is up to date, let's use it:

Enable the El Repo repository (if not already installed):
 $ sudo rpm --import http://elrepo.org/RPM-GPG-KEY-elrepo.org
 $ sudo rpm -Uvh http://elrepo.org/elrepo-release-6-4.el6.elrepo.noarch.rpm
   Note: Skip this step if El Repo is already enabled.

Install that latest version from the El Repo repository (do not use ATrpms!):
 $ sudo yum --enablerepo elrepo install kmod-nvidia
 $ sudo yum --disablerepo=\* --enablerepo=elrepo install nvidia-x11-drv-32bit
   ==> Updated: kmod-nvidia.x86_64 0:310.44-1.el6.elrepo 
   ==> Dependency Updated: nvidia-x11-drv.x86_64 0:310.44-1.el6.elrepo 
   ==> Dependency Updated: nvidia-x11-drv-32bit.x86_64 0:310.44-1.el6.elrepo  

Or, if you want the absolute latest in the El Repo testing repository:
 $ sudo yum --enablerepo elrepo-testing install kmod-nvidia
 $ sudo yum --disablerepo=\* --enablerepo=elrepo-testing install 
nvidia-x11-drv-32bit

Test if you have installed the desired driver:
   $ $ sudo updatedb; locate libvdpau_nvidia.so
 ==> /usr/lib/vdpau/libvdpau_nvidia.so.310.44
 ==> /usr/lib64/vdpau/libvdpau_nvidia.so.310.44

Reboot.


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