Discuss November 2010

discuss@lists.centos.org

259 participants
220 discussions

Re: [CentOS] SELinux - way of the future or good idea but !!!
by brett mm 01 Dec '10

01 Dec '10

> > This is where, as a sysadmin, you need to invest just a little time and > effort learning the system. Honestly, the vast majority of issues are > trivial to solve if you just spend a few hours reading the docs/guides, > and even if you really can't be bothered there are kind folks on this > list (and others) that will likely solve your issues for you. How is > that not worth the extra security SELinux affords? > In reality, I am not at all sure that a quantum leap in complexity adds to security at all. Any proper use of old-school group permissions can give as finely-grained a security policy as you would like. The time spent running SELinux in permissive mode to configure could better be spent looking for holes in the operating system, or helping patch the many bugs that the speedy Linux development schedule lets through: http://lwn.net/Articles/409954/ And then we could have real security, and not a false sense of security generated by heavy-sounding phrases like "mandatory access controls." :-)

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linux-2.6.18.tar.bz2 is missing
by Pascal Robert 30 Nov '10

30 Nov '10

We have to rebuild our kernel to add support for a Mainpine fax board on a CentOS 5.5 board: http://www.hylafax.org/content/Handbook:Basic_Server_Configuration:Modem-sp… We followed all steps, but when calling rpmbuild, we are getting: [root@hylafax SPECS]# rpmbuild -ba --target x86_64 kernel-2.6.spec Construction pour plate-formes cibles: x86_64 Construction pour cible x86_64 erreur: Fichier /usr/src/redhat/SOURCES/linux-2.6.18.tar.bz2: Aucun fichier ou répertoire de ce type So it doesn't find linux-2.6.18.tar.bz2 We do have both the kernel-devel and kernel-headers packages installed, so I don't understand why that file is missing. Googling for "linux-2.6.18.tar.bz2 is missing" didn't bring any useful info. So where/how can we rebuild or get that archive?

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CF disks images and centos
by Jerry Geis 30 Nov '10

30 Nov '10

Hi all, I have 8G -CF cards that I have been putting linux on. Everything was working fine till yesterday when I got a new batch of CF cards. The size has changed. The original CF card was 7637M (255 heads/63 sectors/928 cylinders) The new CF card is 8019M (255 heads/63 sectors/974 cylinders) I would have thought putting the smaller image file onto the larger CF card would be ok. However its not. centos boots but there are journal issues and everything is mounted read-only. Any ideas why this doesnt work or how I can keep my smaller image and "succecssfully" put it on the larger CF card? I simply do "dd if=cf.img of=/dev/sde" to copy the images to CF. Thanks, Jerry

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ssh-agent fails to hold values
by bluethundr 30 Nov '10

30 Nov '10

Hello list I am attempting to manage my key logins with ssh-agent. However EVERY time I try to ssh I have to go through the same exact routing and it's getting a little old... [bluethundr@LCENT01:~]#ssh sum3 Enter passphrase for key '/home/bluethundr/.ssh/id_rsa': [bluethundr@LCENT01:~]#exec ssh-agent bash [bluethundr@LCENT01:~]#ssh-add Enter passphrase for /home/bluethundr/.ssh/id_rsa: Identity added: /home/bluethundr/.ssh/id_rsa (/home/bluethundr/.ssh/id_rsa) [bluethundr@LCENT01:~]#ssh sum3 Last login: Sun Nov 28 14:32:34 2010 from localhost.localdomain ######################################################### # SUMMITNJHOME.COM # # TITLE: LCENT03 BOX # # LOCATION: SUMMIT BASEMENT # # # ######################################################### [bluethundr@LCENT03:~]# Does anyone have any suggestions to make ssh-agent hold these values a bit more persistently? thanks!! -- Here's my RSA Public key: gpg --keyserver pgp.mit.edu --recv-keys B6D6EAC3

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yum/RPM Problem: several packages with the same name were installed, how to remove one of them ?
by giggzounet 30 Nov '10

30 Nov '10

Hi, We have a cluster with CentOS 5.5 installed with oscar. The firm which has pre-installed the cluster has done strange things...and now I get problems: - if I understand correctly what was done, several infiniband CentOS packages were installed (compat-dapl, compat-dapl-devel, compat-dapl-utils, libibcm, libibverb, librdmacm, mpi-selector). - Then the tar package from OFED was installed. This archive contains rpm packages too...and were installed. - So on our nodes we have several versions of "compat-dapl, compat-dapl-devel, compat-dapl-utils, libibcm, libibverb, librdmacm, mpi-selector". I would like to remove the package from CentOS (in order to have homogen OFED environment). How can I do that ? These packages target the sames files...If I remove the package of CentOS, will it erase all the files in common ? how does rpm/yum behave in this situation ? Best regards, Guillaume

2 1

( SOLVED ) Hostname too long
by Johan Scheepers 30 Nov '10

30 Nov '10

Good day, Some time ago I asked some assistance for the long hostname in the terminals. Editing .bashrc in user and root by adding PS1=xxxxxxx did make the difference. Here is something I picked up on another list that make editing .bashrc not necessary. as root.. gedit /etc/sysconfig/network # HOSTNAME=localhost.localdomain change to in my case and that solves the problem HOSTNAME=johan.jan Regards Johan

1 0

centos 5.5 - which partition manager installed
by Johan Scheepers 30 Nov '10

30 Nov '10

Good day, Gparted is not available on my installation. Which patition tool is available in centos 5.5 please. Thanks Johan

7 10

pcscd
by m.roth＠5-cent.us 30 Nov '10

30 Nov '10

Anyone working with/using it? One thing that's driving me nuts is that it keeps spitting garbage into the logs (card absent or mute!!!). I just tried editing /etc/init.d/pcscd - there's *no* way to pass parms from the config file - and set the logging level to --error, and it's still doing it. Clues for the poor, to shut it up? mark

2 3

yum/RPM behaviour: does yum/RPM overwrite a file modified by a user during an update ?
by giggzounet 29 Nov '10

29 Nov '10

Hi, On our cluster with CentOS 5.5, I have a little problem with a script for infiniband (this problem: http://web.archiveorange.com/archive/v/NUQmuN84gd3D31Fdl8PU). So the fix a very easy. But what will yum/RPM do during the next update ? Will it overwrite the file ? Will it write on display that the file was modified by an user (as under debian) ? Thx a lot, Best regards, Guillaume

5 10

the wandering MAC?
by Boris Epstein 29 Nov '10

29 Nov '10

Hi all, I have what appears to be a truly puzzling problem. I've got this P4 32-bit machine running CentOS 5.5 with XEN that has two NICs: one onboard, an Intel Corporation 82540EM Gigabit and one on an expansion card, Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit. The second one is recognized as eth1. What's happening is, it is showing up under one of the two MAC's: either 00:0a:cd:1a:c1:71 or 00:00:00:00:c1:71. If you reboot it the MAC stays the same; if you shutdown and do a full powerdown it seems to change. Obviously, after it goes from one MAC to another you have to play with the start-up scripts for this interface to start up correctly and this becomes a major annoyance. Any idea what all of this mess could mean? Thanks. Boris.

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Discuss November 2010