Re: [CentOS] Partition # does not end on cylinder boundary.

[Nux!]

On 10.08.2012 00:27, Robert Arkiletian wrote:
> Running CentOS 6.3
> Areca hardware raid 10
>
> fdisk -l
>
> reports multiple partitions with the following description.
> "Partition # does not end on cylinder boundary."
>
> Disks are 512 byte sector size.
> Raid stripe size is 64K.
>
> but if I use
>
> fdisk -lc
> (-c Switch off DOS-compatible mode. )
> I don't get any warnings.
>
> Should I reinstall? (performance hit?)

No, that warning can be safely ignored. See for example this:
http://3www.centos.org/modules/newbb/viewtopic.php?topic_id=37197&forum=55

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Re: [CentOS] How to enable system dumps / core dumps

[Nux!]

On 09.08.2012 21:43, Jonathan Vomacka wrote:
> Do you know how I can go about enabling system dumps and/or kernel 
> core
> dumps. I want to be able to have the system dump a core during a 
> panic,
> or crash.

http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/ch-kdump.html

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Re: [CentOS] Strange issue with system time being off

[Leonard den Ottolander]

Hello Mark,

On Thu, 2012-08-09 at 17:03 -0400, m.r...@5-cent.us wrote:
> Russell Jones wrote:
> > Also in case it wasn't clear, I have ran "hwclock --systohc" after
> > "date" shows the correct time.
> >
> Please don't top post.

I do agree. However Mark, perhaps *you* could trim your post too.

Regards,
Leonard.

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Re: [CentOS] Strange issue with system time being off

[Leonard den Ottolander]

Hello Russell,

On Thu, 2012-08-09 at 14:33 -0500, Russell Jones wrote:
> After the system is up. "hwclock" works fine. hwclock --debug does not
> show any error at all.

Have you tried adding --debug to CLOCKFLAGS in rc.sysinit to see if it
reports anything for the first invocation?

Regards,
Leonard.

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Re: [CentOS] Strange issue with system time being off

[Benjamin Donnachie]

On 9 Aug 2012, at 22:03, "m.r...@5-cent.us"  wrote:

> Please don't top post.

Please trim your replies.

Ben
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Re: [CentOS] Strange issue with system time being off

[m . roth]

Benjamin Donnachie wrote:
> On 9 Aug 2012, at 22:03, "m.r...@5-cent.us"  wrote:
>
>> Please don't top post.
>
> Please trim your replies.

I'm sorry, I thought I had. I usually manage that

 mark

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Re: [CentOS] Strange device labeling in 6.3

[Nate Duehr]

On Aug 9, 2012, at 7:43 PM, Kahlil Hodgson  
wrote:

> On 10/08/12 09:18, Reindl Harald wrote:
>> and that is why i use /etc/udev/rules.d/70-persistent-net.rules to
>> pin device-name / MAC and no mac-address in ifconfig-scripts since
>> many years
> 
> +1
> 
> Alternatively, with the biosdevname, you can pin the interface name to 
> the pci(e) slot. That way its a trivial exercise to get 'remote hands' 
> to swap out a dead nic -- no need to fiddle with the mac address.

And if you don't... 

Doing remote hands to swap a bad NIC with someone non-Linux qualified in 
another country, just became the seriously sucky part of your day.  BTDT.  Got 
the t-shirt.

Nate
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Re: [CentOS] Strange device labeling in 6.3

[Les Mikesell]

On Fri, Aug 10, 2012 at 9:15 AM, Nate Duehr  wrote:
> >
>> Alternatively, with the biosdevname, you can pin the interface name to
>> the pci(e) slot. That way its a trivial exercise to get 'remote hands'
>> to swap out a dead nic -- no need to fiddle with the mac address.
>
> And if you don't...
>
> Doing remote hands to swap a bad NIC with someone non-Linux qualified in 
> another country, just became the seriously sucky part of your day.  BTDT.  
> Got the t-shirt.

No, it always has been since the 2.4 kernel days when a deterministic
scan order would always give the same name to the same NIC position.
2.6 has always been a matter of chance if you have more than one card
and don't pin with the MAC address (pairs on cards or the motherboard
stay together and keep the order within the set, but the pairs will
swap).

-- 
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  lesmikes...@gmail.com
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[CentOS] Boot.log Issue

[Cleiton Cipriani]

I everybody... i need help to enable boot.log at CentOS 5... i have a old 
server running for a few months, and sometimes when system boots up, a can see 
FAIL status, but the screen scrools fast and i cant determine which service can 
not boot up properly... 

Best Regards

Cleiton Cipriani
  
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Re: [CentOS] Boot.log Issue

[m . roth]

Cleiton Cipriani wrote:
>
> I everybody... i need help to enable boot.log at CentOS 5... i have a old
> server running for a few months, and sometimes when system boots up, a can
> see FAIL status, but the screen scrools fast and i cant determine which
> service can not boot up properly...
>
/var/log/messages

mark

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Re: [CentOS] Boot.log Issue

[Cleiton Cipriani]

Hi Mark, thanks for your help.. but /var/log/messages does'nt bring the boot 
log fails!

I Have a few boot.log files at /var/log but all empty (0 bytes)

at /etc/syslog.conf the line which refers to system boot log appears to be 
ok... see

# Save boot messages also to boot.log
local7.*/var/log/boot.log

Any Idea?

Cleiton


> Date: Fri, 10 Aug 2012 14:28:43 -0400
> From: m.r...@5-cent.us
> To: centos@centos.org
> Subject: Re: [CentOS] Boot.log Issue
> 
> Cleiton Cipriani wrote:
> >
> > I everybody... i need help to enable boot.log at CentOS 5... i have a old
> > server running for a few months, and sometimes when system boots up, a can
> > see FAIL status, but the screen scrools fast and i cant determine which
> > service can not boot up properly...
> >
> /var/log/messages
> 
> mark
> 
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Re: [CentOS] Boot.log Issue

[m . roth]

Cleiton Cipriani wrote:
>
> Hi Mark, thanks for your help.. but /var/log/messages does'nt bring the
> boot log fails!
>
> I Have a few boot.log files at /var/log but all empty (0 bytes)
>
> at /etc/syslog.conf the line which refers to system boot log appears to be
> ok... see
>
> # Save boot messages also to boot.log
> local7.*/var/log/boot.log
>
> Any Idea?

Have you read through messages from the boot? Or how 'bout dmesg?

  mark

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Re: [CentOS] Boot.log Issue

[Keith Keller]

On 2012-08-10, Cleiton Cipriani  wrote:
>
> I everybody... i need help to enable boot.log at CentOS 5... i have a old 
> server running for a few months, and sometimes when system boots up, a can 
> see FAIL status, but the screen scrools fast and i cant determine which 
> service can not boot up properly... 

You should be able to use ctrl-s to stop the flow of text, then use page
up/down to view the actual messages; when done, ctrl-q (IIRC) will
resume output to the terminal.

--keith

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Re: [CentOS] Boot.log Issue

[Cleiton Cipriani]

Yes, i did check dmesg, and it seens to be right! at FC16 the boot.log works 
ok... but at the CentOS server, not is written there!

Cleiton

I cant see the system boot cuz im not near it, so I can only check the logs, 
but 
> Date: Fri, 10 Aug 2012 14:37:30 -0400
> From: m.r...@5-cent.us
> To: centos@centos.org
> Subject: Re: [CentOS] Boot.log Issue
> 
> Cleiton Cipriani wrote:
> >
> > Hi Mark, thanks for your help.. but /var/log/messages does'nt bring the
> > boot log fails!
> >
> > I Have a few boot.log files at /var/log but all empty (0 bytes)
> >
> > at /etc/syslog.conf the line which refers to system boot log appears to be
> > ok... see
> >
> > # Save boot messages also to boot.log
> > local7.*/var/log/boot.log
> >
> > Any Idea?
> 
> Have you read through messages from the boot? Or how 'bout dmesg?
> 
>   mark
> 
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Re: [CentOS] Boot.log Issue

[Cleiton Cipriani]

Keith, i have not physical access to the server, so its not possible to do that 
commands!

Cleiton

> To: centos@centos.org
> From: kkel...@wombat.san-francisco.ca.us
> Date: Fri, 10 Aug 2012 11:47:33 -0700
> Subject: Re: [CentOS] Boot.log Issue
> 
> On 2012-08-10, Cleiton Cipriani  wrote:
> >
> > I everybody... i need help to enable boot.log at CentOS 5... i have a old 
> > server running for a few months, and sometimes when system boots up, a can 
> > see FAIL status, but the screen scrools fast and i cant determine which 
> > service can not boot up properly... 
> 
> You should be able to use ctrl-s to stop the flow of text, then use page
> up/down to view the actual messages; when done, ctrl-q (IIRC) will
> resume output to the terminal.
> 
> --keith
> 
> -- 
> kkel...@wombat.san-francisco.ca.us
> 
> 
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[CentOS] About Nagios Mail notification

[jiten jha]

Dear Friends,

I have installed Nagios core on my Centos 6.2 server with mailx , postfix.
But I do not know how to configure mail notification , check mail
notification is working  or not . I searched on google but not able to
search any good answer so please help me friend

-- 
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Jitendra Jha
+91-7498370550
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Re: [CentOS] Boot.log Issue

[Michael Coffman]

This was broken in rhel5.   I think all flavors.   Just google 'rhel5
boot.log empty'.It is fixed in rhel6 with the addition of plymouth.

>From the rhel5.3 releasenotes:

Boot-time logging to /var/log/boot.log is not available in Red Hat
Enterprise Linux 5.3

On Fri, Aug 10, 2012 at 1:14 PM, Cleiton Cipriani <
cleitoncipri...@tpa.com.br> wrote:

>
> Keith, i have not physical access to the server, so its not possible to do
> that commands!
>
> Cleiton
>
> > To: centos@centos.org
> > From: kkel...@wombat.san-francisco.ca.us
> > Date: Fri, 10 Aug 2012 11:47:33 -0700
> > Subject: Re: [CentOS] Boot.log Issue
> >
> > On 2012-08-10, Cleiton Cipriani  wrote:
> > >
> > > I everybody... i need help to enable boot.log at CentOS 5... i have a
> old server running for a few months, and sometimes when system boots up, a
> can see FAIL status, but the screen scrools fast and i cant determine which
> service can not boot up properly...
> >
> > You should be able to use ctrl-s to stop the flow of text, then use page
> > up/down to view the actual messages; when done, ctrl-q (IIRC) will
> > resume output to the terminal.
> >
> > --keith
> >
> > --
> > kkel...@wombat.san-francisco.ca.us
> >
> >
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Re: [CentOS] About Nagios Mail notification

[m . roth]

jiten jha wrote:
> Dear Friends,
>
> I have installed Nagios core on my Centos 6.2 server with mailx , postfix.
> But I do not know how to configure mail notification , check mail
> notification is working  or not . I searched on google but not able to
> search any good answer so please help me friend

google  nagios mail notification gets a ton of hits.

 mark

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[CentOS] shutting down a cluster member for maintenance on VMware

[Ryan Palamara]

I need to shutdown a cluster member for maintenance. The member is a VM and 
uses VM fencing, which tries to reboot the VM as part of its operation. What 
would be the best method to shutdown this cluster member to perform maintenance 
on the servers?

I have already moved the cluster services to other nodes.

Thank you,

Ryan Palamara
ZAIS Group, LLC
2 Bridge Avenue, Suite 322
Red Bank, New Jersey 07701
Phone: (732) 450-7444
ryan.palam...@zaisgroup.com




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This is not an offer (or solicitation of an offer) to buy/sell the 
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Re: [CentOS] shutting down a cluster member for maintenance on VMware

[Joseph L. Casale]

>I have already moved the cluster services to other nodes.

Use the mgmt tools to let the node leave the cluster, this is exactly
what they are meant for.
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Re: [CentOS] shutting down a cluster member for maintenance on VMware

[Ryan Palamara]

Ok, so let it leave, and then rejoin it once the maintenance is done. I thought 
that's what should be done, but wanted to confirm.

Thank you,

Ryan Palamara
ZAIS Group, LLC
2 Bridge Avenue, Suite 322
Red Bank, New Jersey 07701
Phone: (732) 450-7444
ryan.palam...@zaisgroup.com

-Original Message-
From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of 
Joseph L. Casale
Sent: Friday, August 10, 2012 5:00 PM
To: CentOS mailing list
Subject: Re: [CentOS] shutting down a cluster member for maintenance on VMware

>I have already moved the cluster services to other nodes.

Use the mgmt tools to let the node leave the cluster, this is exactly what they 
are meant for.
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This is not an offer (or solicitation of an offer) to buy/sell the 
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Revenue Code or (ii) promoting, marketing or recommending any transaction or 
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[CentOS] problems with bind update of 9.8.2.0.10

[Gregory P. Ennis]

Everyone,

I have two x86_64 servers with CentOS 6.3 that seem to have some
difficulty with the last version of bind : 

32:bind-9.8.2-0.10.rc1.el6_3.2.x86_64

When I run htop I am getting a CPU usage of 70 to 80% all of the time.
I am not seeing problems identified in the log files on either machine.

This may have been present before the update of 9.8.2.0, but I certainly
did not notice it.  Has anyone else had this problem.  

Any solutions??

Greg Ennis

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Re: [CentOS] cups printing to a remote network

[Gregory P. Ennis]

On Sat, Aug 04, 2012 at 11:30:48PM -0500, Gregory P. Ennis wrote:
> Everyone,
> 
> I have an need to be able to print to an HP1320 that is usb connected to
> a Fedora 17 desktop on a remote network from a Centos 5.8 cups print
> server on an internal network.  The desktop is in a remote network that
> belongs to to a different client than the one owning the cups print
> server.  
> 
> The F17 usb HP1320 connection works fine, and I can also get the F17
> system to poll the cups print server in order to print to any of the
> printers on the internal network.  So far I have not been able to figure
> out a way to print to the remote HP1320 from inside the internal
> network.  
> 
> I am about ready to ask the remote client to provide a static ip address
> that we can use that to be able to connect separately from them.  It
> just seems there ought to be a way to do this.  I am unable to poll the
> desktop unit on the remote network from the internal network because of
> firewall restrictions on the remote network.  
> 
> Any ideas 
> 
> Greg Ennis

(1) VPN, or somewhat simpler, some sort of tunnelled SSH connection.

(2) Maybe get the remote people to establish an email account for
the printer. Securing this against malmail might be tricky.  I
recently got a Konica Bizhub 20p printer, when nosing around the
telnet interface to it, I noticed it had a built-in ability to suck
print jobs from a POP server.  Absent such an ability on the printer
itself, a dummy user could get your mailed print jobs, perform some
kind of authentication (perhaps with procmail), and then spool the
job.  It could email you back when the job was spooled.

Dave

I had not thought of using POP service.  I could poll that fairly
easily; I would expect it to be a little slower, but I can see how it
would work.  

I have not played with tunneled ssh connections, but that would probably
work the best.  I could dump the print job in a directory on the
internal server, and poll that directory from the remote machine.

Thanks much for your ideas

Greg
-

Dave and others,

I wanted to post my solution so that others may have the benefit of my
trial and error.  

I was never able to get cups to successfully address a remote Desktop
unit that was internal to a foreign network.  I could get cups to allow
the remote Desktop unit in a foreign network to print to any of the
printers in our network.

My solution was to establish a reverse ssh tunnel from the remote
Desktop with :

ssh -R 19926:127.0.0.1:22 user@home_network.com

This allowed the establishment of a connection from the internal network
to the remote Desktop.

Additional I wrote a perl script that is activated by the above command
via :

ssh -R 19926:127.0.0.1:22 user@home_network.com 's.lp.pr'

I redirected the software to print to a file that would not be handed
off to cups, and had s.lp.pr sense those files and copy them to the
remote Desktop, and then after the scp copy this script would execute a
command on the remote Desktop to send the file to the cups daemon on the
remote Desktop.

ie 

Copy the file to the Remote Desktop
   $arg = 
   "scp -P 19926 $PRINT_FILE rem_user\@localhost:/tmp/";
   system ($arg);

Use cups on the remote Desktop to print the file
   $arg_ssh = 
   "ssh rem_user\@localhost -p 19926 'lp -d lpt /tmp/$PRINT_FILE'
   system($arg_ssh);

Also, obviously the $PRINT_FILE needs to be deleted on the Remote
Desktop and the Internal server as well.

There may be better ways to do this, but this worked very well.

Greg Ennis

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Re: [CentOS] How protect bash history file, do audit alike in server

[Tilman Schmidt]

Am 08.08.2012 23:03, schrieb m.r...@5-cent.us:
> Les Mikesell wrote:
>> On Wed, Aug 8, 2012 at 2:56 PM,   wrote:
>>>
>>> 
>>> VCS's that let multiple people check the same object out at the same
>>> time You're *exactly* back where you were before people were using
>>> VCSs.
>>> 
>>
>> Errr, what?  No sensible VCS forces you to wait for someone else to
>> finish their portion of the work.
> 
> You're wrong. I've worked in small and large teams, and *ALWAYS* we
> checked out with locks. If two people need to work on one file, then
> either they need to work together on one copy, and check it back in
> together, or the file needs to be split into more than one, so that one
> person can work on each. This is the way it was at a medium sized
> environmental company I worked at (that was working on ISO 9000), and it
> was the way it was at a Baby Bell I worked at, and it was the way it was
> when I worked on the City of Chicago 911 system.
> 
> I have vehemently been against the fad of the last half a dozen or so
> years, with multiple people checking out and working on the same file.
> I've seen hours or days of a developer's work wiped out, when a team lead
> hacked some quick fixes, then merged the file back in.

It seems you are vehemently against the development model the Linux
kernel is thriving on. Or perhaps you just never had a chance to look at
git.

T.



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Re: [CentOS] About Nagios Mail notification

[Tilman Schmidt]

Am 10.08.2012 22:15, schrieb m.r...@5-cent.us:
> jiten jha wrote:
>> Dear Friends,
>>
>> I have installed Nagios core on my Centos 6.2 server with mailx , postfix.
>> But I do not know how to configure mail notification , check mail
>> notification is working  or not . I searched on google but not able to
>> search any good answer so please help me friend
> 
> google  nagios mail notification gets a ton of hits.

Which might be exactly the problem here.

A (metric) ton of Google hits usually contains 999.999 kilograms of
forum postings advising you to use Google, telling you that you really
don't want what you are asking for, and similar useless drivel,
effectively hiding the one gram of information you are looking for.

I've gone off the idea of Google. It's overrated.

SCNR,
T.



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Re: [CentOS] About Nagios Mail notification

[Scott Robbins]

On Sat, Aug 11, 2012 at 12:41:33AM +0200, Tilman Schmidt wrote:
> Am 10.08.2012 22:15, schrieb m.r...@5-cent.us:
> > jiten jha wrote:
> >> Dear Friends,
> >>
> >> I have installed Nagios core on my Centos 6.2 server with mailx , postfix.
> >> But I do not know how to configure mail notification , check mail
> >> notification is working  or not . I searched on google but not able to
> >> search any good answer so please help me friend

When saying something like that it's good to mention a few examples of the 
search terms
you're using--too often, people say I googled, and it didn't work, but
didn't really google. 


I would try using the article at the CentOS wiki on nagios--even though it's 
dated, it's still one
of the best docs on nagios (which generally has horrible docs, at least it did 
when I set it up years ago).

See how far you get with that. 

I'm assuming that generally, using the mail command on your machine works.  If 
it doesn't, then notifications
won't work either. 



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when I'm not being held hostage by a raving psychotic.
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[CentOS] Repo data lagging behind

[Leonard den Ottolander]

Hello,

I just noticed there's a security update for openldap on C6 that's a few
days old. However my box is not receiving the update. I've checked both
ftp://ftp.plusline.de and ftp://ftp.nluug.nl. Both have the updates in
the Packages directory, which has a mod time of 2012-08-08. However, the
corresponding repodata directories on both mirrors have a mod time of
2012-08-06. Any reason why the repo data hasn't been updated? Or are
those mirrors not syncing correctly for some reason?

Regards,
Leonard.

-- 
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Re: [CentOS] About Nagios Mail notification

[Phil Dobbin]

Scott Robbins wrote:

> I would try using the article at the CentOS wiki on nagios--even though it's 
> dated, it's still one
> of the best docs on nagios (which generally has horrible docs, at least it 
> did when I set it up years ago).
> 
> See how far you get with that. 
> 
> I'm assuming that generally, using the mail command on your machine works.  
> If it doesn't, then notifications
> won't work either. 

Bear in mind OP posted the same question to the debian list
simultaneously substituting Debian server for CentOS & also maybe
English may not be his first language & as we all know even native
English speakers don't speak English too cleverly half the time on Google.

Cheers,

  Phil...

-- 
currently (ab)using
CentOS 6.2, Debian Squeeze, Fedora Beefy, OS X Snow Leopard, Ubuntu Precise

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Re: [CentOS] About Nagios Mail notification

[Phil Dobbin]

Phil Dobbin wrote:

[snip]

Sorry, my mistake, it was the Ubuntu mailing list...

Cheers,

  Phil.

-- 
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CentOS 6.2, Debian Squeeze, Fedora Beefy, OS X Snow Leopard, Ubuntu Precise

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[CentOS] IPv6 on Centos 6

[Alan Batie]

We've been running ipv6 for a year or so now, but some of our newer
instances (all on an ESX cluster) are not working.  It looks like it's
all of our Centos 6 instances.  I'm hoping someone can point me in the
right direction...

tshark indicates that it's neighbor discovery that's failing:

 [26] # cat ../network
NETWORKING=yes
HOSTNAME=centos666.peak.org
GATEWAY=207.55.16.1
NETWORKING_IPV6=yes
IPV6_AUTOTUNNEL=no
IPV6_DEFAULTGW=2607:f678::1

 [27] # cat ifcfg-eth0
DEVICE="eth0"
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE=Ethernet
BOOTPROTO=none
IPADDR=207.55.16.66
PREFIX=22
GATEWAY=207.55.16.1
DNS1=69.59.192.71
DNS2=69.59.192.72
DOMAIN=peak.org
DEFROUTE=yes
IPV6INIT=yes
NAME="System eth0"
IPV6_AUTOCONF=no
IPV6ADDR=2607:f678::16:66/64
IPV6_DEFROUTE=yes

 [28] # ifconfig
eth0  Link encap:Ethernet  HWaddr 00:50:56:98:70:8B
  inet addr:207.55.16.66  Bcast:207.55.19.255  Mask:255.255.252.0
  inet6 addr: fe80::250:56ff:fe98:708b/64 Scope:Link
  inet6 addr: 2607:f678::16:66/64 Scope:Global
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:1862 errors:0 dropped:0 overruns:0 frame:0
  TX packets:266 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:1000
  RX bytes:136703 (133.4 KiB)  TX bytes:33944 (33.1 KiB)

ipv6 is working locally:

 [29] # ping6 2607:f678::16:66
PING 2607:f678::16:66(2607:f678::16:66) 56 data bytes
64 bytes from 2607:f678::16:66: icmp_seq=1 ttl=64 time=0.040 ms
64 bytes from 2607:f678::16:66: icmp_seq=2 ttl=64 time=0.038 ms
^C
--- 2607:f678::16:66 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1870ms
rtt min/avg/max/mdev = 0.038/0.039/0.040/0.001 ms

but not on the lan:

 [5] # ping6 2607:f678::1
PING 2607:f678::1(2607:f678::1) 56 data bytes
>From 2607:f678::16:66 icmp_seq=2 Destination unreachable: Address
unreachable
>From 2607:f678::16:66 icmp_seq=3 Destination unreachable: Address
unreachable
>From 2607:f678::16:66 icmp_seq=4 Destination unreachable: Address
unreachable
>From 2607:f678::16:66 icmp_seq=6 Destination unreachable: Address
unreachable
>From 2607:f678::16:66 icmp_seq=7 Destination unreachable: Address
unreachable
>From 2607:f678::16:66 icmp_seq=8 Destination unreachable: Address
unreachable
^C
--- 2607:f678::1 ping statistics ---
8 packets transmitted, 0 received, +6 errors, 100% packet loss, time 7892ms


tshark for that ping:

 [38] # tshark -n -i eth0 ip6
Running as user "root" and group "root". This could be dangerous.
Capturing on eth0
  0.00 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation
  1.19 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation
  2.43 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation
  4.001030 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation
  5.001076 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation
  6.001045 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation
^C6 packets captured


A centos 5.8 vm with the same virtual network connections works fine:

 [103] # ping6 2607:f678::1
PING 2607:f678::1(2607:f678::1) 56 data bytes
64 bytes from 2607:f678::1: icmp_seq=0 ttl=64 time=1.34 ms
64 bytes from 2607:f678::1: icmp_seq=1 ttl=64 time=0.894 ms
64 bytes from 2607:f678::1: icmp_seq=2 ttl=64 time=0.871 ms

--- 2607:f678::1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 0.871/1.035/1.342/0.219 ms, pipe 2
 [104] # ping6 ipv6.google.com
PING ipv6.google.com(pz-in-x67.1e100.net) 56 data bytes
64 bytes from pz-in-x67.1e100.net: icmp_seq=0 ttl=52 time=14.1 ms
64 bytes from pz-in-x67.1e100.net: icmp_seq=1 ttl=52 time=14.3 ms
64 bytes from pz-in-x67.1e100.net: icmp_seq=2 ttl=52 time=14.3 ms

--- ipv6.google.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 14.185/14.296/14.380/0.081 ms, pipe 2

 [489] # tshark -i eth0 -n ip6
Running as user "root" and group "root". This could be dangerous.
Capturing on eth0
  0.00 2607:f678::56 -> 2607:f678::1 ICMPv6 Echo request
  0.000720 2607:f678::1 -> 2607:f678::56 ICMPv6 Echo reply
  1.000990 2607:f678::56 -> 2607:f678::1 ICMPv6 Echo request
  1.001759 2607:f678::1 -> 2607:f678::56 ICMPv6 Echo reply
  2.001004 2607:f678::56 -> 2607:f678::1 ICMPv6 Echo request
  2.001841 2607:f678::1 -> 2607:f678::56 ICMPv6 Echo reply
  3.002983 2607:f678::56 -> 2607:f678::1 ICMPv6 Echo request
  3.003680 2607:f678::1 -> 2607:f678::56 ICMPv6 Echo reply
  4.003991 2607:f678::56 -> 2607:f678::1 ICMPv6 Echo request
  4.010478 2607:f678::1 -> 2607:f678::56 ICMPv6 Echo reply
  4.650129 2607:f678::1 -> 2607:f678::56 ICMPv6 Neighbor solicitation
  4.650171 2607:f678::56 -> 2607:f678::1 ICMPv6 Neighbor advertisement
12 packets captured


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Re: [CentOS] IPv6 on Centos 6

[Stephen Harris]

On Fri, Aug 10, 2012 at 05:24:12PM -0700, Alan Batie wrote:
> IPV6_DEFROUTE=yes

Not sure where you get that from.  Instead try adding
  IPV6_DEFAULTDEV=eth0
to /etc/sysconfig/network

FWIW you can see the current routing table with "ip -6 route".

-- 

rgds
Stephen
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Re: [CentOS] IPv6 on Centos 6

[Alan Batie]

On 8/10/12 5:50 PM, Stephen Harris wrote:
> On Fri, Aug 10, 2012 at 05:24:12PM -0700, Alan Batie wrote:
>> IPV6_DEFROUTE=yes
> 
> Not sure where you get that from.

That's not something normally in our configs, I think it was in the
default config the centos 6 installer created, and I only stripped out
some of the excess... stuff like that I left in in case it mattered in 6
for some reason...  The config on the working centos 5 systems (which is
what we use on the centos 6 systems also) is much simpler:

 [113] # cat /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=ns6.peak.org
GATEWAY=207.55.16.1
 [114] # cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
BROADCAST=207.55.19.255
IPADDR=207.55.16.53
NETMASK=255.255.252.0
ONBOOT=yes
TYPE=Ethernet

IPV6INIT=yes
IPV6ADDR=2607:f678::56
IPV6_DEFAULTGW=2607:f678::1


> FWIW you can see the current routing table with "ip -6 route".

netstat is the one I usually use:

 [39] # ip -6 router
Object "router" is unknown, try "ip help".
 [40] # netstat -rn -A inet6
Kernel IPv6 routing table
Destination Next Hop
Flags Metric RefUse Iface
2607:f678::/64  ::
U 25610 eth0
fe80::/64   ::
U 25600 eth0
::/02607:f678::1
UG1  50 eth0
::1/128 ::
U 0  11 lo
2607:f678::16:66/128::
U 0  58   1 lo
fe80::250:56ff:fe98:708b/128::
U 0  01 lo
ff00::/8::
U 25600 eth0

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Re: [CentOS] About Nagios Mail notification

[Scott Robbins]

On Sat, Aug 11, 2012 at 12:57:57AM +0100, Phil Dobbin wrote:
> Scott Robbins wrote:
> 

> > I would try using the article at the CentOS wiki on nagios--even though 
> > it's dated, it's still one
> > of the best docs on nagios (which generally has horrible docs, at least it 
> > did when I set it up years ago).
> > 
> > See how far you get with that. 
> > 
> > I'm assuming that generally, using the mail command on your machine works.  
> > If it doesn't, then notifications
> > won't work either. 
> 
> Bear in mind OP posted the same question to the debian list
> simultaneously substituting Debian server for CentOS & also maybe
> English may not be his first language & as we all know even native
> English speakers don't speak English too cleverly half the time on Google.

Ah, that's not so good.However, seriously, I remember when I was
assigned to set up nagios, and until I found Max's articles, I was at sea
myself.

Squeeze, Beefy, Snow Leopard, Precise--one could make a song out of
that--or maybe it's a good title for a band.  


-- 
Scott Robbins
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gpg --keyserver pgp.mit.edu --recv-keys EB3467D6

Xander: How could you let her go? 
Giles: As the soon-to-be-purple area on my jaw will attest, 
I did not 'let' her go. 

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Re: [CentOS] Boot.log Issue

[Keith Keller]

Please do not top-post.

On 2012-08-10, Cleiton Cipriani  wrote:
>
> Keith, i have not physical access to the server, so its not possible to do 
> that commands!

How are you able to see the console if you don't have physical access?
If you're using an IP KVM, IPMI, or serial console, ctrl-s from your own
terminal should still work.

--keith


-- 
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