Discuss May 2012

discuss@lists.centos.org

193 participants
201 discussions

CentOS 6.2: suspending vim with ctrl-z and resuming with fg - stopped working
by Alexander Farber 08 Jun '12

08 Jun '12

Hello, pardon my chaotic question, but does anybody have an idea, why can't I suspend vim-enhanced-7.2.411-1.6.el6.x86_64 with a CTRL-Z, then execute few commands at my bash prompt and then get back to the vim session again with "fg"? It has stopped working at my CentOS 6.2 machine (I haven't noticed exactly when) but works fine with CentOS 5.x. I'm using PuTTY to login to both. The error message I get is: afarber@www:~> fg sudo vim test.pl ~ [1]+ Stopped sudo vim test.pl (and nothing comes up) Thank you Alex

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Upgrading FC2 to CentOS 5.* - anyone second this?
by Max Pyziur 03 Jun '12

03 Jun '12

Greetings, I *do* still have an FC2 box. Would anyone second this procedure: http://www.centos.org/modules/newbb/viewtopic.php?topic_id=14052&forum=37&p… Thanks. Max Pyziur pyz(a)brama.com

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KVM with 6.2 i686 guest
by Jerry Geis 02 Jun '12

02 Jun '12

I just installed a KVM guest, centos 6.2 i686 (6.2 x86_64 host) and the network module is loaded . The modules is/are 8139too,8139cp is what lsmod shows. Dmesg shows link up but ifconfig does not give me an address? service network restart shows OK no errors but again no address. I set the ifcfg-eth0 file to not be NM controlled, onboot yes and rebooted. Same no address. I run 5.8 images all the time and they get the address? Did I forget something? Jerry

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Re: [CentOS] Add another one: the same sealert problem
by m.roth＠5-cent.us 01 Jun '12

01 Jun '12

Well, this is getting more and more unpleasant. Turned out my manager and the other admin were also working on this. One of the times they restarted *something*, or maybe my reinstall, took care of the first problem. Now, however, we're seeing a ton of exceptions... and what's struck me is that I'm *not* getting the normal output from sealert. For example, sealert -v -l 42f9d4f6-6327-4030-b927-d17ab9f4f0d6 2012-05-31 16:52:13,387 [plugin.INFO] importing /usr/share/setroubleshoot/plugins/__init__ as plugins SELinux is preventing /bin/chmod from using the fowner capability. I used the -v to try to get more; I'm not seeing the screenful that usually has more useful info. Could something have been screwed up with selinux, in some way? I know that the other admin installed something, but that was via a ruby-on-rails utility, and shouldn't have looked at anything, much less modified anything.... mark

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issue with CentOS 6.2 autofs
by OVERBEY, DUDLEY 01 Jun '12

01 Jun '12

I have an issue with CentOS 6.2's autofs/automount. When I issue "service autofs start (or restart)" the automount daemon starts as expected, however, I am not able to access any of the exports nfs directories; but if I shutdown the automount daemon and start it by just issuing "/usr/sbin/automount", I am able to access all of the nfs directories. If the system reboots, the nfs directories become no longer available until I stop the automount daemon and restart by issuing "/usr/sbin/automount". Any assistance would be greatly appreciated. doverbey(a)optonline.net

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portmap/NIS mystery
by Boris Epstein 01 Jun '12

01 Jun '12

Hello all, I have a server on my private network that is configured as an NIS server and mapped to a "public" IP address on a firewall. All other TCP ports (SSH, iperf, you name it) are visible from the outside - but the portmapper-managed ports (port 111 itself and the YPSERV/YPXFRD ports, etc.) are not visible from the outside - even though they are alive and well on the internal network. So, here's the question: is there anything special as far as portmapper's networking/security setup that is at play here? Thanks. Boris.

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Re: [CentOS] Upgrading FC2 to CentOS 5.* - anyone second this?
by Les Mikesell 31 May '12

31 May '12

On Wed, May 30, 2012 at 2:54 PM, Reindl Harald <h.reindl(a)thelounge.net> wrote: > > i will not buy the argument with the hardware because > i had in the last years 4 notebooks, 3 workstations > and two different notebooks of my co-developer which > all done many dist-upgrades well if you know how > to prepare and cleanup What does 'last years' mean in kernels? New kernels have gotten better. A google for "FC5 kernel Oops' has 'about 334,000 results', so I'm not the only one. -- Les Mikesell lesmikesell(a)gmail.com

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question for those who run mail servers
by Bob Hoffman 31 May '12

31 May '12

Not technically a centos question, but a lot of you guys seem to manage some large systems and I could use some clarification on a postfix setting.* *reject_unknown_client_hostname (in postfix < 2.3 reject_unknown_client) When I first used this there were issues with users trying to send mail through the server from hotels, wireless spots, etc. This was solved by pushing up permit sasl_authenticated. I took it out after those issues. I read many online posts from 2008 saying too many false positives. (though none were clear if those were incoming mail or from mail users) Do you use reject_unknown_client_hostname? Other than someone trying to access the server to send mail through it as a user I do not see how this could be a bad setting and am thinking of using it. A person sending out a mail to the server, even if in that badly set up hotel wireless should be using their gmail, yahoo, own server, isp mail servers and should not be directly sending from their iphone....is that correct? or do you ignore the use of this setting still? -thanks for any updates on the use of this setting.

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[SOLVED] Re: need assist with upstart config problem
by James B. Byrne 31 May '12

31 May '12

On Wed May 30 17:57:49 EDT 2012, Nataraj wrote: > On Wed, May 30, 2012 17:00, James B. Byrne wrote: >> I am trying, without success, to create an upstart config file to >> automatically start and restart an ssh proxy. The command sting that >> I use in the script has been checked and verified from the shell but >> it fails in the upstart file. >> > The '-f option' tells SSH to run in the background, but normally > upstart expects to wait for the process. Maybe you want '-n' > instead of '-f'. Alternatively, if you run a program in the > background you could specify 'task' in the config file to tell > upstart not to wait for the process (you couldn't use respawn > with that because then the process is not managed by upstart > anymore). The problem in my script appears to be this: # SSH switches used: env SSH_SWITCHES="" env SSH_SWITCHES=${SSH_SWITCHES}" -nNqT -vvv " Upon further investigation I discovered that the env stanza does not expand previously defined variables. My attempt at concatenating values results in the key name being used instead of its value. In other words: '${SSH_SWITCHES} -nNqT -vvv' is what results and not simply '-nNqT -vvv' as one might expect. Exporting the value between env stanzas does not change this behaviour. Eliminating the concatenation attempts resolved the issue. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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Setting up an iSCSI SAN
by Beth Albertson 31 May '12

31 May '12

Hi, Has anyone ever actually implemented a replicating iSCSI SAN using CentOS? I saw directions here: http://wiki.centos.org/HowTos/Ha-Drbd It looks doable, but I am not the strongest linux person and would like to hear if anyone has tried and if there any caveats. Also, I noticed that these directions are for CentOS 5. Is it pretty much the same for CenOS 6? Lastly, this might sound crazy, but we are mostly a Hyper-V shop. Hyper-V supports CentOS 6.0-6.2 and 5.5-5.7. Could I implement this as a guest in Hyper-V or am I just asking for trouble? Sincerely, Beth Albertson Network Analyst City of Olympia (360) 753-8289 balberts(a)ci.olympia.wa.us Work Hours: M 7:15-5:15, Tu 7:15-3:15, W 7:15-5:15, Th 7:15-3:15, F 7:15-4:15

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Discuss May 2012