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2010 Jun 06
4
OT: SysAdmin Stories
Hello, I'm compiling a collection of stories from the systems administrator trenches. They can be short or long, funny or about a particularly challenging problem or period, or even something that appeared very technically challenging and ended up being something very simple. Stories which are more political would be ok so long as they do not have an agenda or can be interpreted as a
2010 Sep 14
5
IOwaits over NFS
Hello. We have a number of Xen 3.4.2. boxes which have constant iowaits at around 10% with spikes up to 100% when accessing data over NFS. We have been unable to nail down the issue. Any advice? System info: release : 2.6.18-194.3.1.el5xen version : #1 SMP Thu May 13 13:49:53 EDT 2010 machine : x86_64 nr_cpus : 16 nr_nodes
2015 Jan 15
3
leap second and Centos
Hi. We have another leap second coming. Have past bugs with Centos and leap seconds (specifically high CPU spikes) been resolved? Should we be worried? -G
2008 Sep 04
2
Nagios 3 RPMs
Is anyone working on Nagios 3.x RPMs? If not, perhaps I'll whip some up and submit them to some appropriate repository. Geoff Galitz Blankenheim NRW, Deutschland http://www.galitz.org
2011 Jan 01
4
automated remote cloning
Good morning/day and Happy New Year. We have a geographically distributed environment (marketing speak: cloud) where we regularly need to migrate individual systems to new hardware (for bigger disks or for better geographical placement, for example). We currently use Cobbler to do our base installs automatically and I am now looking at integrating Clonezilla with Cobbler. The goal is take an
2010 Jan 07
1
centos IDM + sogo
Hello, We are testing the Centos LDAP Directory Server but are running into issues with applications (SOGo) authenticating against the LDAP system. The crux of my question is, can I just treat the Centos Directory Server as a generic OpenLDAP configuration on the client side? In more detail when I try to add account via ldapadd: -------------------------------- ldapadd -f sogo.ldif -x -W -D
2010 Feb 03
0
cannot mount NFS share, portmap problems, what todo? [SOLVED]
On Wed, Feb 3, 2010 at 2:40 PM, Geoff Galitz <geoff at galitz.org> wrote: > > > > Should it be running, or not? > > > > > > >root at mercury:[~]$ netstat -ap --inet | grep rpc > > >tcp 0 0 *:sunrpc *:* > LISTEN 6458/portsentry > > >udp 0 0 localhost:filenet-rpc localhost:filenet-rpc
2008 Nov 10
2
Parallel/Shared/Distributed Filesystems
I'm looking at using GFS for parallel access to shared storage, most likely an iSCSI resource. It will most likely work just fine but I am curious if folks are using anything with fewer system requisites (e.g. installing and configuring the Cluster Suite). Specifically to our case, we have 50 nodes running in-house code (some in Java, some in C) which (among other things) receives JPGs,
2015 Jan 15
2
leap second and Centos
On Thu, Jan 15, 2015 at 9:04 AM, Akemi Yagi <amyagi at gmail.com> wrote: > On Thu, Jan 15, 2015 at 8:43 AM, G Galitz <geoff at galitz.org> wrote: >> We have another leap second coming. Have past bugs with Centos and leap >> seconds (specifically high CPU spikes) been resolved? Should we be worried? > > Apparently Red Hat is well aware of the upcoming leap second:
2008 Jun 25
6
dm-multipath use
Are folks in the Centos community succesfully using device-mapper-multipath? I am looking to deploy it for error handling on our iSCSI setup but there seems to be little traffic about this package on the Centos forums, as far as I can tell, and there seems to be a number of small issues based on my reading the dm-multipath developer lists and related resources. -geoff Geoff Galitz Blankenheim
2008 Oct 23
1
device driver useage
Under Centos 5.X, how can I determine with 100% certainty what driver is associated with a given device other than referencing dmesg? For example, what tool can I use to tell for sure what driver is attached to my eth0 device? I have searched the web, but could not find anything that answered my question. Geoff Galitz Blankenheim NRW, Deutschland http://www.galitz.org
2009 Jun 30
1
commercial support page
So we had that nice long thread about the commercial support page a week ago. There were a few recommendations on changes to the page. What next? It is not clear to me if any recommendations were accepted or are being debated internally or if this fizzled out somehow. Is there any process to this kind of thing other than a few developers agreeing it a good thing and then just doing it?
2009 Jun 30
3
filesize limitation in CentOS or exim?
Hallo, today I had a surprising situation. Exim stopped. It's a German centos 5.3 64 Bit installation so the messages are partial in German. Then I tried a restart: [root at centos ~]# service exim restart exim beenden: [FEHLGESCHLAGEN] exim starten: /bin/bash: line 1: 6596 Die maximale Dateigr??e ist ?berschritten
2009 Aug 06
1
Cmake on Centos
Have folks been using Cmake on Centos5 without issues? I have installed an RPM for it, but I've been running into some apparent configuration issues. -geoff --------------------------------- Geoff Galitz Blankenheim NRW, Germany http://www.galitz.org/ http://german-way.com/blog/ -------------- next part -------------- An HTML attachment was scrubbed... URL:
2010 Feb 03
2
cannot mount NFS share, portmap problems, what todo?
Hi all, I want to map an NFS share from a remote server to a local CentOS 5.4 server, but have a problem with portmap: root at mercury:[~]$ service portmap restart pmap_getmaps rpc problem: RPC: Unable to receive; errno = Connection reset by peer Stopping portmap: [FAILED] Starting portmap: [ OK ] root at
2012 May 03
2
[3.3 beta3] When should the self-heal daemon be triggered?
Hi, I eventually installed three Debian unstable machines, so I could install the GlusterFS 3.3 beta3. I have a question about the self-heal daemon. I'm trying to get a volume which is replicated, with two bricks. I started up the volume, wrote some data, then killed one machine, and then wrote more data to a few folders from the client machine. Then I restarted the second brick server.
2015 Jan 15
0
leap second and Centos
On Thu, Jan 15, 2015 at 8:43 AM, G Galitz <geoff at galitz.org> wrote: > > Hi. > > We have another leap second coming. Have past bugs with Centos and leap > seconds (specifically high CPU spikes) been resolved? Should we be worried? Apparently Red Hat is well aware of the upcoming leap second: https://access.redhat.com/solutions/1317263 Unfortunately all the related
2015 Jan 15
0
leap second and Centos
On 01/16/2015 07:05 AM, Akemi Yagi wrote: > On Thu, Jan 15, 2015 at 9:04 AM, Akemi Yagi <amyagi at gmail.com> wrote: >> On Thu, Jan 15, 2015 at 8:43 AM, G Galitz <geoff at galitz.org> wrote: >>> We have another leap second coming. Have past bugs with Centos and leap >>> seconds (specifically high CPU spikes) been resolved? Should we be worried? >>
2005 Apr 29
2
udev om Opteron
Hello, We have a few systems where udevd seems to failing silently on Opteron based Centos 4 boxes. Has anyone else seen this? -geoff
2009 Jul 07
2
Is there an openssh security problem?
Hello, is there a security issue on CentOS 5.3 with openssh 4.3? I ask that cause of http://www.h-online.com/security/Rumours-of-critical-vulnerability-in-OpenSSH-in-Red-Hat-Enterprise-Linux--/news/113712 and http://secer.org/hacktools/0day-openssh-remote-exploit.html. Should ssh login from internet on CentOS better be disabled? regards Olaf