Re: [CentOS] Choosing a CentOS version

2011-10-04 Thread Christopher Chan 
On Tuesday, October 04, 2011 02:17 PM, Emmanuel Noobadmin wrote:
> On 10/4/11, m.r...@5-cent.us  wrote:
>> Note that the above is true of every single o/s: for example, I think
>> Windows XP is approaching EoL, while Internet Exploder 6 is *past* that
>> (and there was much rejoicing).
>
> IIRC WinXP is already EoL'd for general end users but still a couple
> of years for those on extended commercial support.

up to 2014 and only SP3. Sp2 and older are EOL.
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Re: [CentOS] Problems with Intel Ethernet and module e1000e

2011-10-04 Thread Volker Poplawski 
On 26.09.2011 14:40, John Doe wrote:
> From: Volker Poplawski
>
>> I'm facing a serious problem with the e100e kernel module for Intel
>> 82574L gigabit nics on Centos 6.
>
> I had pbms with my Intel 1000e too.
> Installed elrepo's kmod-e1000e and so far so good...
>
> http://elrepo.org/tiki/kmod-e1000e

Follow up:

Also installed elrepo's e1000e from above url.

No problems so far.


Regards
.Volker
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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread Brian Mathis 
On Mon, Oct 3, 2011 at 10:16 PM, Negative  wrote:
> I built guest vm's one for Windows 7 and one for Windows XP using the
> virtual machine manager on a  just updated to centos 5.7, and they are both
> crashing the host machine. They run only  for a few minutes, but suddenly
> freeze, crashing the host.  There is no networking. No X. No way to drop out
> of X. The only way out is a hard reboot. I don't see anything in the logs --
> messages or libvirt logs -- immediately before the crash.
>
> I haven't found anything like this on the web or on this list. The
> workstation has two xeon E5410s. I noticed that both the kvm-amd and
> kvm-intel modules are loaded, but don't know if that would cause a problem.
> I had an ati firepro graphics card in the machine, but suspected that might
> be the source of some conflict, and I put in an Nvidia card.
>
> The vm's were built with all the defaults. The configuration is just about
> identical to vms I have running on a smaller machine with a dual core
> Athalon.
>
> Thanks for any suggestions.


Is this new hardware?  Have you run any hardware burn testing (CPU,
RAM, etc...) and/or memtest86+ on the RAM?  This sounds like a
hardware issue to me.


-☙ Brian Mathis ❧-
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[CentOS] CentOS 6: hostname and timezone

2011-10-04 Thread Alexander Farber 
Hello,

I've purchased a new dedicated CentOS 6.0 / 64 bit server
and have 2 minor problems please:

1) The "hostname" is reported as CentOS-60-64-minimal at CLI -
 eventhough I've edited /etc/hosts and changed the 2nd line:

127.0.0.1 localhost
176.9.123.123  preferans

2) Why is /etc/localtime a regular file? Should I maybe

rm /etc/localtime
ln -s /usr/share/zoneinfo/Europe/Berlin /etc/localtime

   Why isn't it done by the CentOS 6.0 install?

Thank you
Alex
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Re: [CentOS] CentOS 6: hostname and timezone

2011-10-04 Thread John Kennedy 
On Tue, Oct 4, 2011 at 15:22, John Kennedy  wrote:

> For changing the hostname without restart use the hostname command:
> hostname newhost.domain.com
>
> To keep the new hostname between restarts edit /etc/sysconfig/network, and
> change the hostname there.
>
> Also its a good idea to check /etc/hosts, it can contain the old hostname,
> change/delete it.
>  John Kennedy
>
>
>
>
> On Tue, Oct 4, 2011 at 15:18, Alexander Farber  > wrote:
>
>> Hello,
>>
>> I've purchased a new dedicated CentOS 6.0 / 64 bit server
>> and have 2 minor problems please:
>>
>> 1) The "hostname" is reported as CentOS-60-64-minimal at CLI -
>> eventhough I've edited /etc/hosts and changed the 2nd line:
>>
>> 127.0.0.1 localhost
>> 176.9.123.123  preferans
>>
>>
Sorry for the top post...Hit send before I looked and changed it...Damn web
interface...
John
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Re: [CentOS] CentOS 6: hostname and timezone

2011-10-04 Thread John Kennedy 
For changing the hostname without restart use the hostname command:
hostname newhost.domain.com

To keep the new hostname between restarts edit /etc/sysconfig/network, and
change the hostname there.

Also its a good idea to check /etc/hosts, it can contain the old hostname,
change/delete it.
 John Kennedy



On Tue, Oct 4, 2011 at 15:18, Alexander Farber
wrote:

> Hello,
>
> I've purchased a new dedicated CentOS 6.0 / 64 bit server
> and have 2 minor problems please:
>
> 1) The "hostname" is reported as CentOS-60-64-minimal at CLI -
> eventhough I've edited /etc/hosts and changed the 2nd line:
>
> 127.0.0.1 localhost
> 176.9.123.123  preferans
>
> 2) Why is /etc/localtime a regular file? Should I maybe
>
> rm /etc/localtime
> ln -s /usr/share/zoneinfo/Europe/Berlin /etc/localtime
>
>   Why isn't it done by the CentOS 6.0 install?
>
> Thank you
> Alex
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Re: [CentOS] CentOS 6: hostname and timezone

2011-10-04 Thread Alexander Farber 
Thank you all,

On Tue, Oct 4, 2011 at 4:26 PM, lists-centos
 wrote:
>  2 - you can do the symbolic link, but i believe that RH moved
>     away from that approach for some reason. the appropriate
>     TZ file is copied to /etc/localtime when the TZ is selected
>     on install or changed.

is there maybe a command for setting TZ "in a CentOS way"?

I've looked for redhat-* centos-* system-* in /sbin and /usr/sbin

Regards
Alex
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Re: [CentOS] CentOS 6: hostname and timezone

2011-10-04 Thread Alexander Farber 
And also, which /etc/localtime do I have now?

Is there a way to find out besides running "diff"?
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Re: [CentOS] CentOS 6: hostname and timezone

2011-10-04 Thread Alexander Farber 
Actually I already seem to have the correct timezone file,
but why is the time wrong?


afarber@CentOS-60-64-minimal:~> sudo diff
/usr/share/zoneinfo/Europe/Berlin /etc/localtime

afarber@CentOS-60-64-minimal:~> date
Wed Oct  5 00:35:39 CEST 2011

Should I:

   chkconfig ntp on
   service ntp start

Or is the reasone elsewhere?

Sorry for the basic questions, I'm new to CentOS 6

Regards
Alex
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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread m . roth 
Brian Mathis wrote:
> On Mon, Oct 3, 2011 at 10:16 PM, Negative 
> wrote:
>> I built guest vm's one for Windows 7 and one for Windows XP using the
>> virtual machine manager on a  just updated to centos 5.7, and they are
>> both crashing the host machine. They run only  for a few minutes, but
>> suddenly freeze, crashing the host.  There is no networking. No X. No
>> way to drop out of X. The only way out is a hard reboot. I don't see
>> anything in the logs -- messages or libvirt logs -- immediately before
>> the crash.

> Is this new hardware?  Have you run any hardware burn testing (CPU,
> RAM, etc...) and/or memtest86+ on the RAM?  This sounds like a
> hardware issue to me.

I agree with Brian - it may be coincidental that you built the VMs, and
then it started crashing.

One other question: is selinux enabled?

mark

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Re: [CentOS] CentOS 6: hostname and timezone

2011-10-04 Thread lhecking 
Alexander Farber writes:
> Actually I already seem to have the correct timezone file,
> but why is the time wrong?
> 
> 
> afarber@CentOS-60-64-minimal:~> sudo diff
> /usr/share/zoneinfo/Europe/Berlin /etc/localtime
> 
> afarber@CentOS-60-64-minimal:~> date
> Wed Oct  5 00:35:39 CEST 2011
> 
> Should I:
> 
>chkconfig ntp on
>service ntp start
> 
> Or is the reasone elsewhere?
> 
> Sorry for the basic questions, I'm new to CentOS 6
 
 ntp will change the time in small increments only. If there's a big gap,
 and if you can live with a big jump, set the time manually and then enable
 ntp.

 Also check out system-config-date-1.9.60-1.el6.noarch.rpm.


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[CentOS] CentOS 6: Increase shared memory limits permanently

2011-10-04 Thread Alexander Farber 
Hello again,

on CentOS 6 / 64 bit what is please the best way
to permanently increase the shared memory?

I'd like to give shared_buffers = 4096MB
to PostgreSQL 8.4 on my machine with
16 GB RAM, but I currently only have:

   # sysctl -A|grep shm
   kernel.shmmax = 33554432
   kernel.shmall = 2097152
   kernel.shmmni = 4096

and this produces the error in
 /var/lib/pgsql/pgstartup.log:

FATAL:  could not create shared memory segment: Invalid argument
DETAIL:  Failed system call was shmget(key=5432001, size=4399202304, 03600).
HINT:  This error usually means that PostgreSQL's request for a shared
memory segment exceeded your kernel's SHMMAX parameter.  You can
either reduce the request size or reconfigure the kernel with larger
SHMMAX.  To reduce the request size (currently 4399202304 bytes),
reduce PostgreSQL's shared_buffers parameter (currently 524288) and/or
its max_connections parameter (currently 103).
If the request size is already small, it's possible that it is
less than your kernel's SHMMIN parameter, in which case raising the
request size or reconfiguring SHMMIN is called for.
The PostgreSQL documentation contains more information about
shared memory configuration.

And I wonder if I should set shmmax
or shmall and also if these 2 limits
are total for all machine processes
or per process? (i.e. should I allow
a bit more for processes besides PostgreSQL)?

Thank you
Alex
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Re: [CentOS] CentOS 6: Increase shared memory limits permanently

2011-10-04 Thread John R Pierce 
On 10/04/11 8:45 AM, Alexander Farber wrote:
> on CentOS 6 / 64 bit what is please the best way
> to permanently increase the shared memory?

/etc/sysctl.conf



-- 
john r pierceN 37, W 122
santa cruz ca mid-left coast

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[CentOS] CentOS-announce Digest, Vol 80, Issue 1

2011-10-04 Thread centos-announce-request 
Send CentOS-announce mailing list submissions to
centos-annou...@centos.org

To subscribe or unsubscribe via the World Wide Web, visit
http://lists.centos.org/mailman/listinfo/centos-announce
or, via email, send a message with subject or body 'help' to
centos-announce-requ...@centos.org

You can reach the person managing the list at
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of CentOS-announce digest..."


Today's Topics:

   1. CESA-2011:1349 Important CentOS 5 i386 rpm Update (Karanbir Singh)
   2. CESA-2011:1349 Important CentOS 5 x86_64 rpm  Update
  (Karanbir Singh)


--

Message: 1
Date: Mon, 3 Oct 2011 21:56:34 +
From: Karanbir Singh 
Subject: [CentOS-announce] CESA-2011:1349 Important CentOS 5 i386 rpm
Update
To: centos-annou...@centos.org
Message-ID: <20111003215634.ga8...@chakra.karan.org>
Content-Type: text/plain; charset=us-ascii


CentOS Errata and Security Advisory 2011:1349 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2011-1349.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( md5sum Filename ) 

i386:
4d585e8b12ce27b13ffb5e0d45f9569b  popt-1.10.2.3-22.el5_7.2.i386.rpm
82008752811345bd48c567d238545cde  rpm-4.4.2.3-22.el5_7.2.i386.rpm
4cf07794cbd47cd8571b8e9874fd0e80  rpm-apidocs-4.4.2.3-22.el5_7.2.i386.rpm
85b67b4e8e65eb788b66f3c6948ea855  rpm-build-4.4.2.3-22.el5_7.2.i386.rpm
9519d6cb24377a322153fdeef3f5999a  rpm-devel-4.4.2.3-22.el5_7.2.i386.rpm
90e0e70797846e33bdf987a5fe0b5e9e  rpm-libs-4.4.2.3-22.el5_7.2.i386.rpm
5879391ce7c0d718981425375e21522f  rpm-python-4.4.2.3-22.el5_7.2.i386.rpm

Source:
688cb231c484ea974b4513723f30e273  rpm-4.4.2.3-22.el5_7.2.src.rpm


-- 
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--

Message: 2
Date: Mon, 3 Oct 2011 21:56:35 +
From: Karanbir Singh 
Subject: [CentOS-announce] CESA-2011:1349 Important CentOS 5 x86_64
rpm Update
To: centos-annou...@centos.org
Message-ID: <20111003215635.ga8...@chakra.karan.org>
Content-Type: text/plain; charset=us-ascii


CentOS Errata and Security Advisory 2011:1349 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2011-1349.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( md5sum Filename ) 

x86_64:
4d585e8b12ce27b13ffb5e0d45f9569b  popt-1.10.2.3-22.el5_7.2.i386.rpm
641c57febb29ba8b5e392c321c2e6e81  popt-1.10.2.3-22.el5_7.2.x86_64.rpm
9f9374ac2507e34bf32333ff0f746109  rpm-4.4.2.3-22.el5_7.2.x86_64.rpm
6ae381a435da30c8d6a58957eee28d71  rpm-apidocs-4.4.2.3-22.el5_7.2.x86_64.rpm
3bfd537e4171e4da4edce6a902ed9a3b  rpm-build-4.4.2.3-22.el5_7.2.x86_64.rpm
9519d6cb24377a322153fdeef3f5999a  rpm-devel-4.4.2.3-22.el5_7.2.i386.rpm
8d32b2dfc3674f69e436c938dbb90f25  rpm-devel-4.4.2.3-22.el5_7.2.x86_64.rpm
90e0e70797846e33bdf987a5fe0b5e9e  rpm-libs-4.4.2.3-22.el5_7.2.i386.rpm
dea6f90e1b8fcd0749e6a0721e2fb4c6  rpm-libs-4.4.2.3-22.el5_7.2.x86_64.rpm
0ca72c28170c938d5684ecddbf46d47c  rpm-python-4.4.2.3-22.el5_7.2.x86_64.rpm

Source:
688cb231c484ea974b4513723f30e273  rpm-4.4.2.3-22.el5_7.2.src.rpm


-- 
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Re: [CentOS] CentOS 6: Increase shared memory limits permanently

2011-10-04 Thread Yavor Nikolov 
* shmall is total for all processes (in pages)
* shmmax is the maximum size of single contiguous shared memory segment (in
bytes)
Both should be tuned to be large enough (obviously shmmax should be able to
fit into shmall)

If the memory is locked you may  need to tune /etc/security/limits.conf too.

Another setting which affects shared memory are huge pages (I don't know if
PostgreSQL could utilize that feature)

On Tue, Oct 4, 2011 at 18:53, John R Pierce  wrote:

> On 10/04/11 8:45 AM, Alexander Farber wrote:
> > on CentOS 6 / 64 bit what is please the best way
> > to permanently increase the shared memory?
>
> /etc/sysctl.conf
>
>
>
> --
> john r pierceN 37, W 122
> santa cruz ca mid-left coast
>
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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread Negative 
On Tue, Oct 4, 2011 at 10:41 AM,  wrote:

> Brian Mathis wrote:
> > On Mon, Oct 3, 2011 at 10:16 PM, Negative 
> > wrote:
> >> I built guest vm's one for Windows 7 and one for Windows XP using the
> >> virtual machine manager on a  just updated to centos 5.7, and they are
> >> both crashing the host machine. They run only  for a few minutes, but
> >> suddenly freeze, crashing the host. Â There is no networking. No X. No
> >> way to drop out of X. The only way out is a hard reboot. I don't see
> >> anything in the logs -- messages or libvirt logs -- immediately before
> >> the crash.
> 
> > Is this new hardware?  Have you run any hardware burn testing (CPU,
> > RAM, etc...) and/or memtest86+ on the RAM?  This sounds like a
> > hardware issue to me.
>

It's about three years old. I had one hardware issue a year ago in which a
video card fried, but it's been great. I will run memtest this afternoon.


> I agree with Brian - it may be coincidental that you built the VMs, and
> then it started crashing.
>

I should run memtest. I don't know of a tool to check the processors. I use
the machine for analyzing data, and often use most of the 32 gigs of memory
in it, but I doubt I've ever seriously stressed the processors.

I created the two guests with the gui, but since they crash, I started one
without starting X on the host, using virsh. The guest and host both stay
up. When starting using  virsh with the --console switch I get what looks
like a telnet connection. But I know almost nothing about Windows and don't
know what to look at. Networking between the guest and host might be borked
-- and that would've been my fault. Then, every time X is running the guest
and host crash.


>
> One other question: is selinux enabled?
>

Yes. No warnings, though.

>
>mark
>
>
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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread Brian Mathis 
On Tue, Oct 4, 2011 at 12:05 PM, Negative  wrote:
> On Tue, Oct 4, 2011 at 10:41 AM,  wrote:
>
>> Brian Mathis wrote:
>> > On Mon, Oct 3, 2011 at 10:16 PM, Negative 
>> > wrote:
>> >> I built guest vm's one for Windows 7 and one for Windows XP using the
>> >> virtual machine manager on a  just updated to centos 5.7, and they are
>> >> both crashing the host machine. They run only  for a few minutes, but
>> >> suddenly freeze, crashing the host. Â There is no networking. No X. No
>> >> way to drop out of X. The only way out is a hard reboot. I don't see
>> >> anything in the logs -- messages or libvirt logs -- immediately before
>> >> the crash.
>> 
>> > Is this new hardware?  Have you run any hardware burn testing (CPU,
>> > RAM, etc...) and/or memtest86+ on the RAM?  This sounds like a
>> > hardware issue to me.
>
> It's about three years old. I had one hardware issue a year ago in which a
> video card fried, but it's been great. I will run memtest this afternoon.
>
>> I agree with Brian - it may be coincidental that you built the VMs, and
>> then it started crashing.
>>
> I should run memtest. I don't know of a tool to check the processors. I use
> the machine for analyzing data, and often use most of the 32 gigs of memory
> in it, but I doubt I've ever seriously stressed the processors.
>
> I created the two guests with the gui, but since they crash, I started one
> without starting X on the host, using virsh. The guest and host both stay
> up. When starting using  virsh with the --console switch I get what looks
> like a telnet connection. But I know almost nothing about Windows and don't
> know what to look at. Networking between the guest and host might be borked
> -- and that would've been my fault. Then, every time X is running the guest
> and host crash.
>>
>> One other question: is selinux enabled?
>>
>
> Yes. No warnings, though.
>>
>>        mark


It should not matter what the guest is, so Windows or Linux it
shouldn't be crashing.  If not hardware, it points to a bug in the
hypervisor software.


-☙ Brian Mathis ❧-
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Re: [CentOS] CentOS 6: hostname and timezone

2011-10-04 Thread ken 
On 10/04/2011 10:33 AM Alexander Farber wrote:
> And also, which /etc/localtime do I have now?
> 
> ...

Please run these commands and copy-paste them w/ output back to me:


cat /etc/sysconfig/clock
/etc/init.d/ntpd status
/sbin/hwclock
date
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Re: [CentOS] CentOS 6: hostname and timezone

2011-10-04 Thread Alexander Farber 
Actually it is working now, thank you all!

[root@preferans afarber]# cat /etc/sysconfig/clock
ZONE="Europe/Berlin"
[root@preferans afarber]# /etc/init.d/ntpd status
ntpd (pid  1365) is running...
[root@preferans afarber]# /sbin/hwclock
Tue 04 Oct 2011 07:10:06 PM CEST  -0.797338 seconds
[root@preferans afarber]# date
Tue Oct  4 19:10:09 CEST 2011
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Re: [CentOS] CentOS 6: Increase shared memory limits permanently

2011-10-04 Thread m . roth 
Alexander Farber wrote:
> Hello again,
>
> on CentOS 6 / 64 bit what is please the best way
> to permanently increase the shared memory?
>
> I'd like to give shared_buffers = 4096MB
> to PostgreSQL 8.4 on my machine with
> 16 GB RAM, but I currently only have:
>
># sysctl -A|grep shm
>kernel.shmmax = 33554432
>kernel.shmall = 2097152
>kernel.shmmni = 4096
>
> and this produces the error in
>  /var/lib/pgsql/pgstartup.log:

> And I wonder if I should set shmmax

Yes. As a point of information, you do this for Oracle as well.

mark

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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread m . roth 
Negative wrote:
> On Tue, Oct 4, 2011 at 10:41 AM,  wrote:
>> Brian Mathis wrote:
>> > On Mon, Oct 3, 2011 at 10:16 PM, Negative 
>> > wrote:
 I built guest vm's one for Windows 7 and one for Windows XP using the
 virtual machine manager on a  just updated to centos 5.7, and they
 are both crashing the host machine. They run only  for a few minutes,

>> > Is this new hardware?  Have you run any hardware burn testing (CPU,
>> > RAM, etc...) and/or memtest86+ on the RAM?  This sounds like a
>> > hardware issue to me.
>
> It's about three years old. I had one hardware issue a year ago in which a
> video card fried, but it's been great. I will run memtest this afternoon.
>
>> I agree with Brian - it may be coincidental that you built the VMs, and
>> then it started crashing.

> -- and that would've been my fault. Then, every time X is running the
> guest and host crash.
>>
>> One other question: is selinux enabled?
>
> Yes. No warnings, though.

More and more it sounds like a hardware issue. Hmm, every time X is
running, and you say you had one video card fried - how did it fry? Also,
is this machine on a good quality surge protector? Have you had a
thunderstorm, or power outages recently?

mark

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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread Negative 
On Tue, Oct 4, 2011 at 1:18 PM,  wrote:

> Negative wrote:
> > On Tue, Oct 4, 2011 at 10:41 AM,  wrote:
> >> Brian Mathis wrote:
> >> > On Mon, Oct 3, 2011 at 10:16 PM, Negative  >
> >> > wrote:
>  I built guest vm's one for Windows 7 and one for Windows XP using the
>  virtual machine manager on a  just updated to centos 5.7, and they
>  are both crashing the host machine. They run only  for a few minutes,
> 
> >> > Is this new hardware?  Have you run any hardware burn testing (CPU,
> >> > RAM, etc...) and/or memtest86+ on the RAM?  This sounds like a
> >> > hardware issue to me.
> >
> > It's about three years old. I had one hardware issue a year ago in which
> a
> > video card fried, but it's been great. I will run memtest this afternoon.
> >
> >> I agree with Brian - it may be coincidental that you built the VMs, and
> >> then it started crashing.
> 
> > -- and that would've been my fault. Then, every time X is running the
> > guest and host crash.
> >>
> >> One other question: is selinux enabled?
> >
> > Yes. No warnings, though.
>
> More and more it sounds like a hardware issue. Hmm, every time X is
> running, and you say you had one video card fried - how did it fry? Also,
> is this machine on a good quality surge protector? Have you had a
> thunderstorm, or power outages recently?
>
>mark
>

The vendor told me that the particular video card model (I forget which) had
some flaw. In any case the fan stopped running, and it heated up. I usually
use the machine remotely but I was at the console at that moment. The
monitor started flickering and then went gray.

The vendor sent a replacement, but I had thrown an old ATI in before it
arrived. When the crashes occurred now, I finally put in the replacement.
Same behavior.

The surge protector is good. I live in NYC and the biggest environmental
hazard is the cleaning lady, who has in the past tripped the surge protector
switch.

I fear you're right about the hardware. But as far as I can tell everything
else works fine. I went overboard in buying two quad processors -- so I
could live with one if that's the problem.
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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread m . roth 
Negative wrote:
> On Tue, Oct 4, 2011 at 1:18 PM,  wrote:
>> Negative wrote:
>> > On Tue, Oct 4, 2011 at 10:41 AM,  wrote:
>> >> Brian Mathis wrote:
>> >> > On Mon, Oct 3, 2011 at 10:16 PM, Negative
>> > >
>> >> > wrote:
>>  I built guest vm's one for Windows 7 and one for Windows XP using
>>  the
>>  virtual machine manager on a  just updated to centos 5.7, and they
>>  are both crashing the host machine. They run only  for a few
>> minutes,
>> 
>> >> > Is this new hardware?  Have you run any hardware burn testing (CPU,
>> >> > RAM, etc...) and/or memtest86+ on the RAM?  This sounds like a
>> >> > hardware issue to me.
>> >

>> More and more it sounds like a hardware issue. Hmm, every time X is
>> running, and you say you had one video card fried - how did it fry?
>> Also,
>> is this machine on a good quality surge protector? Have you had a
>> thunderstorm, or power outages recently?
>
> The vendor told me that the particular video card model (I forget which)
> had some flaw. In any case the fan stopped running, and it heated up. I
> usually use the machine remotely but I was at the console at that moment.
> The monitor started flickering and then went gray.
>
> The vendor sent a replacement, but I had thrown an old ATI in before it
> arrived. When the crashes occurred now, I finally put in the replacement.
> Same behavior.

Have you examined the m/b and cards *around* where the card fried? Its
heat death may have affected things around it.
>
> The surge protector is good. I live in NYC and the biggest environmental
> hazard is the cleaning lady, who has in the past tripped the surge
> protector switch.

 Do you know the story about the mainframe shop, the racks of tapes,
and the cleaning staff?
>
> I fear you're right about the hardware. But as far as I can tell
> everything else works fine. I went overboard in buying two quad
> processors -- so I could live with one if that's the problem.

A replacement m/b?

   mark


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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread Toby Bluhm 


If you haven't already, check the mainboard & power supply for bad 
capacitors:

http://en.wikipedia.org/wiki/Capacitor_plague

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Re: [CentOS] CentOS 6: Increase shared memory limits permanently

2011-10-04 Thread Alexander Farber 
Thanks, I've put (for my 16GB RAM / 64 bit machine)
into /etc/sysctl.conf: kernel.shmmax = 50

And into postgresql.conf: shared_buffers = 4096MB

I didn't change shmall from the default -

# sysctl -A|grep shm
kernel.shmmax = 50
kernel.shmall = 2097152
kernel.shmmni = 4096

because

# getconf PAGE_SIZE
4096

and 2097152 * 4096 < 50, correct?

Now PostgreSQL 8.4.x seems to run ok

Regards
Alex
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[CentOS] postmap: fatal: open database /etc/postfix/sasl_passwd.db: Permission denied

2011-10-04 Thread Alexander Farber 
I'm trying to configure mail forwarding through Gmail
on CentOS 6 with postfix, following the blog
http://carlton.oriley.net/blog/?p=31
and I think the blog has missed the step:

# postmap /etc/postfix/sasl_passwd

 - as I've seen in the /var/log/maillog:

postfix/smtp[1926]: fatal: open database /etc/postfix/sasl_passwd.db:
No such file or directory
postfix/master[1831]: warning: process /usr/libexec/postfix/smtp pid
1926 exit status 1
postfix/master[1831]: warning: /usr/libexec/postfix/smtp: bad command
startup -- throttling

But when I try to run postmap, I get

postmap: fatal: open database /etc/postfix/sasl_passwd.db: Permission denied

even though the postfix service is stopped,
the SELinux is permissive and the file is writable:

[root@preferans postfix]# ll
-rw-r--r--. 1 rootroot  20K Jun 25 14:50 access
-rw-r--r--. 1 rootroot  12K Jun 25 14:50 canonical
-rw-r--r--. 1 rootroot 9.7K Jun 25 14:50 generic
-rw-r--r--. 1 rootroot  18K Jun 25 14:50 header_checks
-rw-r--r--. 1 rootroot  27K Oct  4 20:24 main.cf
-rw-r--r--. 1 rootroot  27K Oct  4 20:23 main.cf.OLD
-rw-r--r--. 1 rootroot 5.0K Jun 25 14:50 master.cf
-rw-r--r--. 1 rootroot 6.7K Jun 25 14:50 relocated
-rw-r--r--. 1 postfix root  113 Oct  4 20:25 sasl_passwd
-rw-r--r--. 1 rootroot  13K Jun 25 14:50 transport
-rw-r--r--. 1 rootroot  13K Jun 25 14:50 virtual

Has anybody fought this problem already?

Thank you
Alex
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Re: [CentOS] postmap: fatal: open database /etc/postfix/sasl_passwd.db: Permission denied

2011-10-04 Thread m . roth 
Alexander Farber wrote:
> I'm trying to configure mail forwarding through Gmail
> on CentOS 6 with postfix, following the blog
> http://carlton.oriley.net/blog/?p=31
> and I think the blog has missed the step:
>
> # postmap /etc/postfix/sasl_passwd
>
>  - as I've seen in the /var/log/maillog:
>
> postfix/smtp[1926]: fatal: open database /etc/postfix/sasl_passwd.db:
> No such file or directory

> But when I try to run postmap, I get
>
> postmap: fatal: open database /etc/postfix/sasl_passwd.db: Permission
> denied
>
> even though the postfix service is stopped,
> the SELinux is permissive and the file is writable:
>
> [root@preferans postfix]# ll
> -rw-r--r--. 1 rootroot  20K Jun 25 14:50 access

One thing I keep finding very annoying with most versions of Linux is the
alias for ll, which is *not* what I was used to in sun, Solaris, Irix, or
Tru64. Out of curiosity, try ls -laF /etc/postfix, and the libexec, and
let's see what permissions and ownerships the *directories* have.

   mark

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Re: [CentOS] postmap: fatal: open database /etc/postfix/sasl_passwd.db: Permission denied

2011-10-04 Thread Alexander Farber 
Nevermind - solved that by

# sudo chown root.root sasl_passwd

(sorry, too tired in the evening)

On Tue, Oct 4, 2011 at 9:04 PM, Alexander Farber
 wrote:
> I'm trying to configure mail forwarding through Gmail
> on CentOS 6 with postfix, following the blog
> http://carlton.oriley.net/blog/?p=31
> and I think the blog has missed the step:
>
> # postmap /etc/postfix/sasl_passwd
>
>  - as I've seen in the /var/log/maillog:
>
> postfix/smtp[1926]: fatal: open database /etc/postfix/sasl_passwd.db:
> No such file or directory
> postfix/master[1831]: warning: process /usr/libexec/postfix/smtp pid
> 1926 exit status 1
> postfix/master[1831]: warning: /usr/libexec/postfix/smtp: bad command
> startup -- throttling
>
> But when I try to run postmap, I get
>
> postmap: fatal: open database /etc/postfix/sasl_passwd.db: Permission denied
>
> even though the postfix service is stopped,
> the SELinux is permissive and the file is writable:
>
> [root@preferans postfix]# ll
> -rw-r--r--. 1 root    root  20K Jun 25 14:50 access
> -rw-r--r--. 1 root    root  12K Jun 25 14:50 canonical
> -rw-r--r--. 1 root    root 9.7K Jun 25 14:50 generic
> -rw-r--r--. 1 root    root  18K Jun 25 14:50 header_checks
> -rw-r--r--. 1 root    root  27K Oct  4 20:24 main.cf
> -rw-r--r--. 1 root    root  27K Oct  4 20:23 main.cf.OLD
> -rw-r--r--. 1 root    root 5.0K Jun 25 14:50 master.cf
> -rw-r--r--. 1 root    root 6.7K Jun 25 14:50 relocated
> -rw-r--r--. 1 postfix root  113 Oct  4 20:25 sasl_passwd
> -rw-r--r--. 1 root    root  13K Jun 25 14:50 transport
> -rw-r--r--. 1 root    root  13K Jun 25 14:50 virtual
>
> Has anybody fought this problem already?
>
> Thank you
> Alex
>
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Re: [CentOS] postmap: fatal: open database /etc/postfix/sasl_passwd.db: Permission denied

2011-10-04 Thread Alexander Farber 
Thank you, the "ls -laF" tip is good

And now I unfortunately get:

postfix/postfix-script[2054]: starting the Postfix mail system
postfix/master[2056]: daemon started -- version 2.6.6, configuration
/etc/postfix
postfix/qmgr[2059]: F10CC31D62CC: from=,
size=609, nrcpt=1 (queue active)
postfix/smtp[2061]: warning: cannot get RSA certificate from file
/etc/pki/tls/gmail_relay/server.pem: disabling TLS support
postfix/smtp[2061]: warning: TLS library problem:
2061:error:0906D06C:PEM routines:PEM_read_bio:no start
line:pem_lib.c:698:Expecting: TRUSTED CERTIFICATE:
postfix/smtp[2061]: warning: TLS library problem:
2061:error:140DC009:SSL
routines:SSL_CTX_use_certificate_chain_file:PEM lib:ssl_rsa.c:729:
postfix/smtp[2061]: F10CC31D62CC: to=,
orig_to=, relay=smtp.gmail.com[74.125.39.109]:587, delay=2963,
delays=2963/0.07/0.03/0.01, dsn=5.7.0, status=bounced (host
smtp.gmail.com[74.125.39.109] said: 530 5.7.0 Must issue a STARTTLS
command first. m26sm26530788fac.6 (in reply to MAIL FROM command))
postfix/cleanup[2064]: 2FE0C31D6686:
message-id=<20111004191529.2FE0C31D6686@preferans.localdomain>
postfix/bounce[2063]: F10CC31D62CC: sender non-delivery notification:
2FE0C31D6686
postfix/qmgr[2059]: 2FE0C31D6686: from=<>, size=2696, nrcpt=1 (queue active)
postfix/qmgr[2059]: F10CC31D62CC: removed
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Re: [CentOS] postmap: fatal: open database /etc/postfix/sasl_passwd.db: Permission denied

2011-10-04 Thread Alexander Farber 
Eventhough I have at the bottom of main.cf:

 GMail SSL SMTP Relay
relayhost = [smtp.gmail.com]:587
#auth
smtp_sasl_auth_enable=yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

#tls
smtp_use_tls = yes
smtp_sasl_security_options = noanonymous
smtp_sasl_tls_security_options = noanonymous
smtp_tls_note_starttls_offer = yes
tls_random_source = dev:/dev/urandom
smtp_tls_scert_verifydepth = 5
smtp_tls_key_file=/etc/pki/tls/gmail_relay/server.key
smtp_tls_cert_file=/etc/pki/tls/gmail_relay/server.pem
smtpd_tls_ask_ccert = yes
smtpd_tls_req_ccert =no
smtp_tls_enforce_peername = no


On Tue, Oct 4, 2011 at 9:18 PM, Alexander Farber
 wrote:
> postfix/smtp[2061]: F10CC31D62CC: to=,
> orig_to=, relay=smtp.gmail.com[74.125.39.109]:587, delay=2963,
> delays=2963/0.07/0.03/0.01, dsn=5.7.0, status=bounced (host
> smtp.gmail.com[74.125.39.109] said: 530 5.7.0 Must issue a STARTTLS
> command first. m26sm26530788fac.6 (in reply to MAIL FROM command))
> postfix/cleanup[2064]: 2FE0C31D6686:
> message-id=<20111004191529.2FE0C31D6686@preferans.localdomain>
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Re: [CentOS] CentOS 6: Increase shared memory limits permanently

2011-10-04 Thread Yavor Nikolov 
Seems OK for PostgreSQL. You should also take into account the requirements
of the other applications on that server too (if any).
Actually it's 5 000 000 000 < 2097152 * 4096 == 8 589 934 592. Which is OK.

You can use ipcs monitor the allocated shared memory segments and their
actual size.

http://www.postgresql.org/docs/8.4/static/kernel-resources.html
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Oracle_Tuning_Guide/(This
is for Oracle but its memory tuning is quite similar and you may find
some useful information in this guide).

On Tue, Oct 4, 2011 at 21:56, Alexander Farber
wrote:

> Thanks, I've put (for my 16GB RAM / 64 bit machine)
> into /etc/sysctl.conf: kernel.shmmax = 50
>
> And into postgresql.conf: shared_buffers = 4096MB
>
> I didn't change shmall from the default -
>
> # sysctl -A|grep shm
> kernel.shmmax = 50
> kernel.shmall = 2097152
> kernel.shmmni = 4096
>
> because
>
> # getconf PAGE_SIZE
> 4096
>
> and 2097152 * 4096 < 50, correct?
>
> Now PostgreSQL 8.4.x seems to run ok
>
> Regards
> Alex
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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread Negative 
On Tue, Oct 4, 2011 at 2:24 PM,  wrote:

> Negative wrote:
> > On Tue, Oct 4, 2011 at 1:18 PM,  wrote:
> >> Negative wrote:
> >> > On Tue, Oct 4, 2011 at 10:41 AM,  wrote:
> >> >> Brian Mathis wrote:
> >> >> > On Mon, Oct 3, 2011 at 10:16 PM, Negative
> >>  >> >
> >> >> > wrote:
> >>  I built guest vm's one for Windows 7 and one for Windows XP using
> >>  the
> >>  virtual machine manager on a  just updated to centos 5.7, and they
> >>  are both crashing the host machine. They run only  for a few
> >> minutes,
> >> 
> >> >> > Is this new hardware?  Have you run any hardware burn testing (CPU,
> >> >> > RAM, etc...) and/or memtest86+ on the RAM?  This sounds like a
> >> >> > hardware issue to me.
> >> >
> 
> >> More and more it sounds like a hardware issue. Hmm, every time X is
> >> running, and you say you had one video card fried - how did it fry?
> >> Also,
> >> is this machine on a good quality surge protector? Have you had a
> >> thunderstorm, or power outages recently?
> >
> > The vendor told me that the particular video card model (I forget which)
> > had some flaw. In any case the fan stopped running, and it heated up. I
> > usually use the machine remotely but I was at the console at that moment.
> > The monitor started flickering and then went gray.
> >
> > The vendor sent a replacement, but I had thrown an old ATI in before it
> > arrived. When the crashes occurred now, I finally put in the replacement.
> > Same behavior.
>
> Have you examined the m/b and cards *around* where the card fried? Its
> heat death may have affected things around it.
>

It looks good to the eye. The capacitors look good.


> >
> > The surge protector is good. I live in NYC and the biggest environmental
> > hazard is the cleaning lady, who has in the past tripped the surge
> > protector switch.
>
>  Do you know the story about the mainframe shop, the racks of tapes,
> and the cleaning staff?
>

Don't know it but I can imagine.


> >
> > I fear you're right about the hardware. But as far as I can tell
> > everything else works fine. I went overboard in buying two quad
> > processors -- so I could live with one if that's the problem.
>
> A replacement m/b?
>
>
That's a tough one!

Since the crashes can be duplicated and are only caused by this one
combination of events, I don't know.

On another machine, I had a case where none of the kvm guests would boot. It
turned out to be a conflict between libvirt and the nvidia proprietary
driver. I used an old version of the video driver until Nvidia caught up.
(It only affected amd processors.)
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Re: [CentOS] Expunge Old Email

2011-10-04 Thread Adam Tauno Williams 
On Tue, 2011-09-27 at 08:31 -0400, John Hinton wrote:
> For those of you running mailservers on CentOS 6, what are the 
> suggestions for programs to expunge old email? For instance, deleting 
> email from a Spam folder that is 2 weeks old or older.
> I see that Dovecot does have a solution, but was wondering about what 
> others have landed on.

Cyrus IMAP supports an "expire" annotation on folders that allows
automatic cycling out of messages after the indicated number of days.



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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread Les Mikesell 
On Tue, Oct 4, 2011 at 2:51 PM, Negative  wrote:
> >
> Since the crashes can be duplicated and are only caused by this one
> combination of events, I don't know.
>
> On another machine, I had a case where none of the kvm guests would boot. It
> turned out to be a conflict between libvirt and the nvidia proprietary
> driver. I used an old version of the video driver until Nvidia caught up.
> (It only affected amd processors.)

Do you have to use the local video at all?   What happens if you use
freenx and run in a session started from a remote NX client?

-- 
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   lesmikes...@gmail.com
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Re: [CentOS] Problems with Intel Ethernet and module e1000e

2011-10-04 Thread Dennis Jacobfeuerborn 
On 10/04/2011 03:54 PM, Volker Poplawski wrote:
> On 26.09.2011 14:40, John Doe wrote:
>> From: Volker Poplawski
>>
>>> I'm facing a serious problem with the e100e kernel module for Intel
>>> 82574L gigabit nics on Centos 6.
>>
>> I had pbms with my Intel 1000e too.
>> Installed elrepo's kmod-e1000e and so far so good...
>>
>> http://elrepo.org/tiki/kmod-e1000e
>
> Follow up:
>
> Also installed elrepo's e1000e from above url.
>
> No problems so far.

Activating the CR repo and updating the kernel might also fix any issues 
with the e1000e driver (that did the trick for me).

Regards,
   Dennis
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Re: [CentOS] Problems with Intel Ethernet and module e1000e

2011-10-04 Thread Lorenzo Martínez Rodríguez 
El 04/10/11 22:18, Dennis Jacobfeuerborn escribió:
> On 10/04/2011 03:54 PM, Volker Poplawski wrote:
>> On 26.09.2011 14:40, John Doe wrote:
>>> From: Volker Poplawski
>>>
 I'm facing a serious problem with the e100e kernel module for Intel
 82574L gigabit nics on Centos 6.
>>> I had pbms with my Intel 1000e too.
>>> Installed elrepo's kmod-e1000e and so far so good...
>>>
>>> http://elrepo.org/tiki/kmod-e1000e
>> Follow up:
>>
>> Also installed elrepo's e1000e from above url.
>>
>> No problems so far.
> Activating the CR repo and*updating the kernel might also fix any issues*
> with the e1000e driver (that did the trick for me).

Or create new ones, as happened to me
>
> Regards,
> Dennis
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>


-- 


Lorenzo Martinez Rodriguez

Visit me:   http://www.lorenzomartinez.es
Mail me to: lore...@lorenzomartinez.es
My blog: http://www.securitybydefault.com
My twitter: @lawwait
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Re: [CentOS] postmap: fatal: open database /etc/postfix/sasl_passwd.db: Permission denied

2011-10-04 Thread Craig White 

On Oct 4, 2011, at 12:18 PM, Alexander Farber wrote:

> Thank you, the "ls -laF" tip is good
> 
> And now I unfortunately get:
> 
> postfix/postfix-script[2054]: starting the Postfix mail system
> postfix/master[2056]: daemon started -- version 2.6.6, configuration
> /etc/postfix
> postfix/qmgr[2059]: F10CC31D62CC: from=,
> size=609, nrcpt=1 (queue active)
> postfix/smtp[2061]: warning: cannot get RSA certificate from file
> /etc/pki/tls/gmail_relay/server.pem: disabling TLS support
> postfix/smtp[2061]: warning: TLS library problem:
> 2061:error:0906D06C:PEM routines:PEM_read_bio:no start
> line:pem_lib.c:698:Expecting: TRUSTED CERTIFICATE:
> postfix/smtp[2061]: warning: TLS library problem:
> 2061:error:140DC009:SSL
> routines:SSL_CTX_use_certificate_chain_file:PEM lib:ssl_rsa.c:729:
> postfix/smtp[2061]: F10CC31D62CC: to=,
> orig_to=, relay=smtp.gmail.com[74.125.39.109]:587, delay=2963,
> delays=2963/0.07/0.03/0.01, dsn=5.7.0, status=bounced (host
> smtp.gmail.com[74.125.39.109] said: 530 5.7.0 Must issue a STARTTLS
> command first. m26sm26530788fac.6 (in reply to MAIL FROM command))
> postfix/cleanup[2064]: 2FE0C31D6686:
> message-id=<20111004191529.2FE0C31D6686@preferans.localdomain>
> postfix/bounce[2063]: F10CC31D62CC: sender non-delivery notification:
> 2FE0C31D6686
> postfix/qmgr[2059]: 2FE0C31D6686: from=<>, size=2696, nrcpt=1 (queue active)
> postfix/qmgr[2059]: F10CC31D62CC: removed

this is your problem and it is significant...

> postfix/smtp[2061]: warning: TLS library problem:
> 2061:error:0906D06C:PEM routines:PEM_read_bio:no start
> line:pem_lib.c:698:Expecting: TRUSTED CERTIFICATE:
> postfix/smtp[2061]: warning: TLS library problem:
> 2061:error:140DC009:SSL

There's something wrong with this file as it is not a PEM encoded certificate 
file as is expected.

Easy enough to verify...

openssl x509 -in $YOUR_CERTIFICATE.pem -noout -text

Craig
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Re: [CentOS] postmap: fatal: open database /etc/postfix/sasl_passwd.db: Permission denied

2011-10-04 Thread Alexander Farber 
Hello,

On Tue, Oct 4, 2011 at 10:37 PM, Craig White  wrote:
>> postfix/smtp[2061]: warning: TLS library problem:
>> 2061:error:0906D06C:PEM routines:PEM_read_bio:no start
>> line:pem_lib.c:698:Expecting: TRUSTED CERTIFICATE:
>> postfix/smtp[2061]: warning: TLS library problem:
>> 2061:error:140DC009:SSL
>
> There's something wrong with this file as it is not a PEM encoded certificate 
> file as is expected.
>
> Easy enough to verify...
>
> openssl x509 -in $YOUR_CERTIFICATE.pem -noout -text

oops, sorry, after struggling I've just deleted
that file and installed sendmail. I'll try your suggestion
later though with my development VM.

Could the reason also be that I've started with
a minimalistic CentOS 6 installation and was
missing the cyrus-sasl-plain and cyrus-sasl-md5 packages?

Thank you
Alex
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[CentOS] Migrating CentOS 5 -> 6: where to put /etc/inittab respawn scripts?

2011-10-04 Thread Alexander Farber 
Hello,

sorry, for 1 more question on CentOS 5 -> CentOS 6 migration.

On my old CentOS 5.7 machine I have the following line:

pref:3:respawn:/bin/su -c '/usr/local/pref/pref.pl >/tmp/pref-`date
+%a`.txt 2>&1' afarber

and this has served me well, I don't want to install
anything else like daemontools etc. - to keep my web-server
easily reinstallable (or movable to another hoster).

But now I have migrated to CentOS 6.0, added that line
and the "init q", but nothing happens - as indeed promised
by the comments in the new /etc/inittab.

Where should I move my line, which docs to read?

The pref.pl is a poll()ing TCP-sockets daemon for a game

Thank you
Alex
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Re: [CentOS] Migrating CentOS 5 -> 6: where to put /etc/inittab respawn scripts?

2011-10-04 Thread Brian Mathis 
On Tue, Oct 4, 2011 at 5:44 PM, Alexander Farber
 wrote:
> Hello,
>
> sorry, for 1 more question on CentOS 5 -> CentOS 6 migration.
>
> On my old CentOS 5.7 machine I have the following line:
>
> pref:3:respawn:/bin/su -c '/usr/local/pref/pref.pl >/tmp/pref-`date
> +%a`.txt 2>&1' afarber
>
> and this has served me well, I don't want to install
> anything else like daemontools etc. - to keep my web-server
> easily reinstallable (or movable to another hoster).
>
> But now I have migrated to CentOS 6.0, added that line
> and the "init q", but nothing happens - as indeed promised
> by the comments in the new /etc/inittab.
>
> Where should I move my line, which docs to read?
>
> The pref.pl is a poll()ing TCP-sockets daemon for a game
>
> Thank you
> Alex


This sounds like something you should be using the 'service' framework
for, instead of inittab.  In CentOS 5 you would create a script in
/etc/init.d and start the service from there.  I'm not yet familiar
with CentOS 6, but I would bet looking for docs on how to do that will
lead you in the right direction.


-☙ Brian Mathis ❧-
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Re: [CentOS] postmap: fatal: open database /etc/postfix/sasl_passwd.db: Permission denied

2011-10-04 Thread Craig White 

On Oct 4, 2011, at 1:46 PM, Alexander Farber wrote:

> Hello,
> 
> On Tue, Oct 4, 2011 at 10:37 PM, Craig White  wrote:
>>> postfix/smtp[2061]: warning: TLS library problem:
>>> 2061:error:0906D06C:PEM routines:PEM_read_bio:no start
>>> line:pem_lib.c:698:Expecting: TRUSTED CERTIFICATE:
>>> postfix/smtp[2061]: warning: TLS library problem:
>>> 2061:error:140DC009:SSL
>> 
>> There's something wrong with this file as it is not a PEM encoded 
>> certificate file as is expected.
>> 
>> Easy enough to verify...
>> 
>> openssl x509 -in $YOUR_CERTIFICATE.pem -noout -text
> 
> oops, sorry, after struggling I've just deleted
> that file and installed sendmail. I'll try your suggestion
> later though with my development VM.
> 
> Could the reason also be that I've started with
> a minimalistic CentOS 6 installation and was
> missing the cyrus-sasl-plain and cyrus-sasl-md5 packages?

I personally have found postfix much easier to deal with in all phases, 
especially with details such as sasl and ldap.

I think your issue was not understanding what the certificates are, how they 
are created, how they interact, etc. and thus your issue really isn't going to 
be solved with either postfix or sendmail but rather certificates in general.

If you are going to have self-signed certificates, you need a mechanism to:

1 - create a CA (Certificate Authority) and generate a private key and a CA 
Certificate. This private key would be needed to sign certificate requests.

2 - generate a signing request for various services such as an SMTP server - 
this should include a directive to output the key into a separate file. This 
key is NOT the CA key.

3 - sign the request which generates a PEM encoded certificate and thus you 
should end up with 3 files useful for your SMTP server:
- ca certificate
- smtp certificate
- smtp key (for the certificate)

This methodology counts on various SMTP servers to not verify the client 
certificate your SMTP server presents (ie, Google in your case if I recall 
correctly) which is generally the case.

I have implemented a reasonably feature complete set of scripts to be my own CA 
with 4 distinct certificate types (1 for HTTP server, 1 for IMAP servers, 1 for 
SMTP servers and 1 for LDAP servers) and a reasonably feature complete set of 
scripts for an LDAP server (master), LDAP server (slave aka replicant) and LDAP 
clients and at some point, I will try to figure out a way to pass this info on 
to others but I suspect that it will take a long time to document because I 
would suspect that the target audience isn't fully up to speed.

I don't think either of the 2 cyrus-sasl packages you mentioned are required to 
send e-mail via tls to Google's SMTP server but I haven't installed RHEL or 
CentOS 6 so I wouldn't know but those are very small packages and won't hurt to 
install... I think they are both geared to your server authenticating users but 
I am not sure.

Craig

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Re: [CentOS] Migrating CentOS 5 -> 6: where to put /etc/inittab respawn scripts?

2011-10-04 Thread Johnny Tan 
On Oct 4, 2011 5:45 PM, "Alexander Farber" 
wrote:
>
> Where should I move my line, which docs to read?

Like recent Ubuntus, C6 uses upstart in place of traditional Sys V init.

Likely, you will want this in /etc/init/ -- note!, not the same as
/etc/init.d/

johnny
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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread Negative 
On Tue, Oct 4, 2011 at 4:16 PM, Les Mikesell  wrote:

> On Tue, Oct 4, 2011 at 2:51 PM, Negative 
> wrote:
> > >
> > Since the crashes can be duplicated and are only caused by this one
> > combination of events, I don't know.
> >
> > On another machine, I had a case where none of the kvm guests would boot.
> It
> > turned out to be a conflict between libvirt and the nvidia proprietary
> > driver. I used an old version of the video driver until Nvidia caught up.
> > (It only affected amd processors.)
>
> Do you have to use the local video at all?   What happens if you use
> freenx and run in a session started from a remote NX client?
>

Doesn't freenx use X? I haven't installed but will try it.

What I did try was to leave X off on workstation and built a fedora guest. I
also connected to the workstation from another machine via ssh and I tried
running the virt-viewer via X-forwarding, it stayed up for about 10 or 15
minutes and crashed. Since I could see the console on the work station then,
it showed a kernel panic.

After rebooting I opened a terminal via ssh and it seems ok -- up for about
30 minutes so far, I'll check in the morning.

The trouble with that is I usually connect to the workshop via vnc, so I'm
not sure the guest will be of much use.
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Re: [CentOS] guest vms crash host systems

2011-10-04 Thread Les Mikesell 
On Tue, Oct 4, 2011 at 11:41 PM, Negative  wrote:
>
>> Do you have to use the local video at all?   What happens if you use
>> freenx and run in a session started from a remote NX client?
>>
>
> Doesn't freenx use X? I haven't installed but will try it.

Yes, it uses X, but it doesn't use the local video hardware.

> What I did try was to leave X off on workstation and built a fedora guest. I
> also connected to the workstation from another machine via ssh and I tried
> running the virt-viewer via X-forwarding, it stayed up for about 10 or 15
> minutes and crashed. Since I could see the console on the work station then,
> it showed a kernel panic.

Not sure what that means.   Freenx would at least keep the sesson
active when you disconnect.


> After rebooting I opened a terminal via ssh and it seems ok -- up for about
> 30 minutes so far, I'll check in the morning.
>
> The trouble with that is I usually connect to the workshop via vnc, so I'm
> not sure the guest will be of much use.

A vncserver session not attached to the local console should also
avoid local hardware issues - but freenx/NX is nicer to use.

-- 
   Les Mikesell
lesmikes...@gmail.com
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[CentOS] Migrating CentOS 5 -> 6: where to put /etc/inittab respawn scripts?

2011-10-04 Thread R P Herrold 
On Tue, 4 Oct 2011, Johnny Tan wrote:

> Like recent Ubuntus, C6 uses upstart in place of traditional Sys V init.
>
> Likely, you will want this in /etc/init/ -- note!, not the same as
> /etc/init.d/

I don't know WHAT you are looking at, if anything, but it is 
not a CentOS 6 install;  'upstart' is a non-starter for the 
future, and certainly not in CentOS' upstream's plans

[root@centos6-32 ~]# rpm -qa sys\*
sysvinit-tools-2.87-3.dsf.el6.i686
system-config-firewall-base-1.2.27-3.el6_0.2.noarch
[root@centos6-32 ~]# cd /etc/init.d/
[root@centos6-32 init.d]# ls
atd   crond  iptablesnetfsrsyslogsingle udev-post
auditdfunctions  killall network  sandboxsnmpd
cgconfig  halt   named   rdiscsaslauthd  snmptrapd
cgred ip6tables  netconsole  restorecond  sendmail   sshd
[root@centos6-32 init.d]# ls -al ../rc*
-rwxr-xr-x. 1 root root  2617 Jun 25 00:07 ../rc
-rwxr-xr-x. 1 root root   220 Jun 25 00:07 ../rc.local
-rwxr-xr-x. 1 root root 19088 Jun 25 00:07 ../rc.sysinit

../rc0.d:
total 8
drwxr-xr-x.  2 root root 4096 Oct  3 12:27 .
drwxr-xr-x. 10 root root 4096 Aug 18 07:03 ..
lrwxrwxrwx.  1 root root   13 Oct  3 12:02 K05atd -> ../init.d/atd
lrwxrwxrwx.  1 root root   19 Oct  3 12:02 K10saslauthd -> ../init.d/saslauthd
lrwxrwxrwx.  1 root root   14 Oct  3 12:02 K25sshd -> ../init.d/sshd
lrwxrwxrwx.  1 root root   18 Oct  3 12:02 K30sendmail -> ../init.d/sendmail
lrwxrwxrwx.  1 root root   20 Oct  3 12:02 K50netconsole -> ../init.d/netconsole
lrwxrwxrwx.  1 root root   15 Oct  3 12:02 K50snmpd -> ../init.d/snmpd
  ...

-- Russ herrold
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Re: [CentOS] Migrating CentOS 5 -> 6: where to put /etc/inittab respawn scripts?

2011-10-04 Thread Alexander Farber 
Hello,

unfortunately /etc/init.d doesn't seem to suit me:

I want my (sockets) script to be restarted when crashed or killed

(I kill it every night to solve memory issues with perl interpreter)

Regards
Alex
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