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34753 discussions

gdm_slave_xioerror_handler problem
by sync 07 Jan '11

07 Jan '11

Hi , guys: Today , I work on my laptop which uses the CentOS x86_64 operating system , Suddenly the X-windows restarts when left at the login screen for more than a few seconds. The error in my syslog is: Apr 12 15:26:45 localhost gdm[2892]: gdm_slave_xioerror_handler: Fatal X error - Restarting :0 This message came up serval times previously ~ Any other help would be nice. Thanks in advance ~

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linux batch job "sleep" problem???
by mcclnx mcc 07 Jan '11

07 Jan '11

we have Redhat 5.5 on server. Recently we tried to use "sleep" command on batch job script some sleep work but some not sleep. any one have ideal? ==== sample program === #/bin/bash set -v program1 sleep 30 program2 sleep 60 program3 sleep 40 ...

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Quoting practice
by Leonard den Ottolander 07 Jan '11

07 Jan '11

Hi guys and girls, It would be appreciated by many if you could strip quotes in your replies. Having to wade through a fully quoted mail to find a one or two line reply followed by one or more quoted footers is just a waste of time, bandwidth, disk space and cpu cycles. This might not be a problem if only one or two of the posters here would be lazy with regard to stripping replies, but there's quite a few of those here and if you receive hundreds of mails a day it all adds up. Also these mails end up in the mail boxes of probably thousands of readers. Please keep your quotes concise and to the point. If you have a one line reply chances are the quote you are replying to isn't much longer. Help us keep the signal to noise ratio up. Thank you very much! Regards, Leonard. -- mount -t life -o ro /dev/dna /genetic/research

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Re: [CentOS] happy new year :D i have a problem to upgrade my glibc to 2.7 on centos 5.5
by Ritika Garg 07 Jan '11

07 Jan '11

I also want glibc 2.7 for a particular application to run. The first step mentioned is : Step1:download nasm src.rpm from official site I did not understand what will this rpm do? I mean is that a substitute for glibc 2.7?

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if you install cgi programs from rpm, how to configure for actual use in /var/www/html ?
by Paul Johnson 07 Jan '11

07 Jan '11

In Centos 5.5, I've had this same experience over and over. I have no trouble installing CGI programs the old fashioned way (untar into /var/www/html and configure), but don't like un-rpm managed files floating about. So I can install, for example, phpMyAdmin, from EPEL. That phpMyAdmin RPM drops files into a bunch of locations, the php files are under /usr/share/phpMysql and then there are also: /etc/httpd/conf.d/phpMyAdmin.conf /etc/phpMyAdmin /etc/phpMyAdmin/config.inc.php and this: /var/lib/phpMyAdmin /var/lib/phpMyAdmin/config /var/lib/phpMyAdmin/save /var/lib/phpMyAdmin/upload In order to make this actually work on the web server, I copy the directory /usr/share/phpMyAdmin into /var/www/html and then I edit the /etc/httpd/conf.d/phpMyAdmin.conf. Then it works. Then a new version of the phpMyAdmin RPM is released on EPEL, it gets installed, and I have no idea what I'm supposed to do to keep my thing in /var/www/html working. I had the exact same experience with the mediawiki RPM from EPEL. It installs its files into /var/www/ var/www/mediawiki116 and /usr/share/mediawiki116 The web server required everything to b e under /var/www/html/, so I copy files in there. The mediawiki116 documentation does not mention this problem, but I've googled long enough until I found this, which agrees with me that it is necessary to copy the files over in order to use the media wiki. http://www.wikihow.com/Install-MediaWiki-on-Fedora Unfortunately, now the upgrade path is obscured. When RPM updates its files (scattered over the file system), what to do? --- Paul E. Johnson Professor, Political Science 1541 Lilac Lane, Room 504 University of Kansas

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Problem with SSHD update.
by James B. Byrne 07 Jan '11

07 Jan '11

This morning I applied the 13 or so new updates to my servers. On one of them the ssh service and clients stopped working immediately after the update. I restarted the server in anticipation that there might be some instability introduced by updating on a system with active ssh connections. However, this has not cleared the problem. The packages in question are: openssh.i386 0:4.3p2-41.el5_5.1 openssh-askpass.i386 0:4.3p2-41.el5_5.1 openssh-clients.i386 0:4.3p2-41.el5_5.1 openssh-server.i386 0:4.3p2-41.el5_5.1 The error I am getting when attempting to start the sshd service is this: Starting sshd: Auto configuration failed 6486:error:0E065068:configuration file routines:STR_COPY:variable has no value:conf_def.c:629:line 207 [FAILED] Can anyone reading this inform me as to what this means, what the likely cause is, and how it may be repaired? I have webmin access to the server and, as it is inside our firewall I can probably enable telnet to get a terminal window do carry out modifications. But I need to know what it is that I need to modify. Alternatively, can anyone point me to a reference regarding removing the current version of openssh and reverting to the prior version, which worked with presumably the same user configuration that the present version does not accept. The only references that I can find respecting this error message are all several years old and some of them suggest that their is a problem with accessing or using /dev/random or /dev/urandom. This matter is somewhat urgent. I have temporarily routed essential ssh connections through a spare host but the box affected sits in front of our legacy systems providing secure access to them as their native OSs and telecom protocols do not support encryption. It is very important that the SSHD service be restored on this host as soon as is possible. Any help with this is gratefully appreciated. -- *** 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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Multiple LUN support
by Abilio Carvalho 07 Jan '11

07 Jan '11

I have Centos 5.2 and am trying to set up my first tape loader, a Quantum SuperLoader 3. My "cat /proc/scsi/scsi" outputs the following: Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: transtec Model: PV610F16R1C Rev: 373I Type: Direct-Access ANSI SCSI revision: 05 Host: scsi1 Channel: 00 Id: 01 Lun: 00 Vendor: HP Model: Ultrium 3-SCSI Rev: D22D Type: Sequential-Access ANSI SCSI revision: 03 Host: scsi1 Channel: 00 Id: 05 Lun: 00 Vendor: HP Model: Ultrium 4-SCSI Rev: B54Z Type: Sequential-Access ANSI SCSI revision: 05 It is my understanding that there should be TWO devices for the loader, one for the tape drive and one for itself. From reading around, it seems that it's lacking Multiple LUM support. My question is, are more recent versions of CentOS enabling that by default? Either compiling kernel modules or doing a full upgrade of the system are "big" jobs in my case, but I'd prefer the upgrade if 5.5 works out of the box. Or do I really need to recompile kernel, enable max_lums in modprobe.conf, etc? Thank you Abe ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by Clearswift for the presence of computer viruses. www.clearswift.com **********************************************************************

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Configuring printers in CentOS 5
by Glenn Eychaner 07 Jan '11

07 Jan '11

Could someone please explain to me how to best configure printers in CentOS 5? I've been trying to configure a new printer, which is served by a Mac Mini: If I open a web browser at localhost:631, or "system-configure-printers" and I configure the new printer as an IPP printer, it winds up in a list of "Remote printers", and once it winds up there I can't seem to delete the printer or change the settings at all. If I try using the system-config-printers interface, it's all greyed out; if I try using CUPS, it actually tries to connect to CUPS on the Mini! In order to delete it, I have to manually revert the /etc/cups files and restart the cups printing system in system-config-services. I just don't understand printer configuration on Linux. On the Macs, it's just plug and go. Why does CentOS have to make it so confusing? -G. -- Glenn Eychaner (geychaner(a)lco.cl) Telescope Systems Programmer, Las Campanas Observatory

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SELinux - way of the future or good idea but !!!
by Alison 07 Jan '11

07 Jan '11

Hi, total newbie on CentOS. Just firing up an install of 5.5 on a development webserver. Installed Webmin, Awstats, PHPMyAdmin and Drupal successfully. Yet to work on Sendmail and Samba. SELinux in enforcing mode, reporting "SELinux preventing ifconfig (ifconfig_t) "read write" to /var/webminsessiondb.pag (var_t)". Googled the error message without real success in finding fix - bug reports showing. Question is whether worth pursuing as SELinux is the way of the future. Or is SELinux a good idea that never really made it's way into the sun. Thoughts please. Alison PS. Semi-retired. Cut my teeth as sys prog on RSX11-M systems eons ago.

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Tar so slow! Is there anything faster?
by Dotan Cohen 07 Jan '11

07 Jan '11

I need to tar up a good 100 GiB of files, but tar is progressing at a rate of about 1 MiB per second. Is there something, anything, faster? Thanks! -- Dotan Cohen http://gibberish.co.il http://what-is-what.com

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