Discuss February 2010

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273 participants
232 discussions

Serial Port or USB monitoring / Logging
by Gregory P. Ennis 15 Feb '10

15 Feb '10

Dear List, I have a piece of equipment that sends data or reports data via a serial or usb port. I would like to connect this piece of equipment to a serial or usb port of a Centos 5.4 machine and capture the report information. I thought this would be an easy perl task, but since I have not completed the objective ... it has not been easy yet. Do any of you have any perl scripts that do this? I would like to look at your logic either for a serial or usb port. Thanks in advance!!!! Greg Ennis

4 8

where is MySQL-zrm-client rpm package?
by Robert P. J. Day 15 Feb '10

15 Feb '10

i was looking at options for backing up mysql databases across the net, and ran across this: http://www.zmanda.com/download-zrm.php clearly, there are two rpms for linux: * MySQL-zrm-2.2.0-1.noarch.rpm * MySQL-zrm-client-2.2.0-1.noarch.rpm but on a centos 5.4 system, if i do # yum search zrm i see only "MySQL-zrm.noarch". anyone know why the centos repo would only know about one of those packages? i suspect that, to be safe, i should download the ones from the zmanda site. rday -- ======================================================================== Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ========================================================================

2 1

xterm clones on VNC problem
by Emmanuel Noobadmin 15 Feb '10

15 Feb '10

I've been scratching my head over this one after setting up VNC on another existing server. Followed the instructions here http://wiki.centos.org/HowTos/VNC-Server as usual. It worked initially. However since this server is going to be installed in a rather inconvenient place and having done pretty stupid things before, I decided for the first time to try the portion that says # Add the following line to ensure you always have an xterm available. ( while true ; do xterm ; done ) & So that I don't inevitably do something like kill kde and find myself unable to do anything. The problem now is, for some reason, I get 4 xterm window after restarting (or stop/start) vncserver. The symptoms now are 1. Consistently, of the four xterms window, #3 and #4 can be closed. #1 and #2 will resurrect themselves. *** Removing the while loop from /home/user/.vnc/xstartup does not change this. 2. if I comment out this line in /home/user/.vnc/xstartup exec /etc/X11/xinit/xinitrc I will not get this problem. At least there will only be one xterm window in what I think is the primitive twm desktop. 3. If I then uncomment the xinitrc line, I get back 4 xterms window after restarting vncserver. It's like KDE is somehow insisting on running that while loop even after I've deleted it from the xstartup file. How do I fix this? Admittedly I could simply minimize the two xterm windows and/or switch virtual desktop and ignore them. but obviously something is wrong and it makes me uncomfortable. Everything is 5.3 standard, I've not touched the default X11 config nor xinitrc. Except I did do an yum update to current.

3 8

CentOS-announce Digest, Vol 60, Issue 3
by centos-announce-request＠centos.org 14 Feb '10

14 Feb '10

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2010:0101 Important CentOS 3 i386 openoffice.org - security update (Tru Huynh) 2. CESA-2010:0101 Important CentOS 3 x86_64 openoffice.org - security update (Tru Huynh) 3. CESA-2010:0101 Important CentOS 5 i386 openoffice.org Update (Karanbir Singh) 4. CESA-2010:0101 Important CentOS 5 x86_64 openoffice.org Update (Karanbir Singh) ---------------------------------------------------------------------- Message: 1 Date: Sun, 14 Feb 2010 00:15:08 +0100 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2010:0101 Important CentOS 3 i386 openoffice.org - security update To: centos-announce(a)centos.org Message-ID: <20100213231507.GE20504(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2010:0101 openoffice.org security update for CentOS 3 i386: https://rhn.redhat.com/errata/RHSA-2010-0101.html The following updated file has been uploaded and is currently syncing to the mirrors: i386: updates/i386/RPMS/openoffice.org-1.1.2-46.2.0.EL3.i386.rpm updates/i386/RPMS/openoffice.org-i18n-1.1.2-46.2.0.EL3.i386.rpm updates/i386/RPMS/openoffice.org-libs-1.1.2-46.2.0.EL3.i386.rpm source: updates/SRPMS/openoffice.org-1.1.2-46.2.0.EL3.src.rpm You may update your CentOS-3 i386 installations by running the command: yum update openoffice.org Tru -- Tru Huynh (mirrors, CentOS-3 i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B

1 0

USB GPS
by Ray Van Dolson 14 Feb '10

14 Feb '10

Anyone ever used the iGPS-500 under CentOS 5? Any recommendations on a USB-based GPS that "just works"? Ray

5 5

How to display laptop screen on LCD TV?
by hce 14 Feb '10

14 Feb '10

Hi, I am running CentOS 5.2 on Acer laptop, I try to display laptop screen on a LCD TV via VGA cable. It was fine while PC was booting in text mode, but as soon as I started X Window, the LCD TV has error "Unsupported signal, adjust your PC out". How can I adjust or may be regenerate an xorg.conf for the LCD TV (Sony KDL-40V5500)? Thank you. Kind Regards, Jupiter

4 5

How to remove an entry in the media table
by Todd Cary 13 Feb '10

13 Feb '10

I messed up the other day when I did a rsync backup to my usb external drive *but* forgot to mount it (turn it on). So the system appears to have renamed the correct one (external) to usbdrive1 and created a directory on the HD, usbdrive. It has been well over a year since I made that error and have forgotten the location and name of the table that contains the usbdrive and usbdrive1 entries. As I recall, I need to edit the table by removing the usbdrive entry and renaming usbdrive1 to usbdrive. Guidance is welcomed.... Todd -- Ariste Software Petaluma, CA 94952 http://www.toddcary.com/aristephotography/

1 0

xfs_repair doesn't fix sb versionnum missing attr
by C Linus Hicks 12 Feb '10

12 Feb '10

I run: xfs_check /dev/sdc10 And it reports: sb versionnum missing attr bit 10 Then I run: xfs_repair /dev/sdc10 And it reports output from 7 phases and "done". Again I run: xfs_check /dev/sdc10 And it reports: sb versionnum missing attr bit 10 Is this how it's supposed to work? Thanks for any help. Linus

2 1

12 Feb '10

A server at work today appeared unresponsive to all network traffic. The machine in question doesn't have a k/v/m terminal; it's configured to use a serial console. So I connected to the serial console and got /etc/issue (with all the \char sequences properly expanded). At the login: prompt I typed root and pressed Enter. Several seconds went by before the Password: prompt was displayed. I typed the password and soon saw Login timed out after 60 seconds At which point /etc/issue and the login: prompt reappeared. Later investigation revealed the load average was hovering around 100, so it's unlikely the machine would be able to process the username and password in under a minute. I'm trying to figure out if it's possible to lengthen that timeout value from 60 to, say, 180. This isn't the first time I've wanted to kill a runaway process and been unable to get a console because of that timeout. -- Paul Heinlein <> heinlein(a)madboa.com <> http://www.madboa.com/

3 3

Re: [CentOS] xfs_repair doesn't fix sb versionnum missing attr
by C Linus Hicks 12 Feb '10

12 Feb '10

On Fri, 2010-02-12 at 07:02 -0500, Brent L. Bates wrote: > The first question is did you unmount the file system first before doing > both the xfs_check and xfs_repair? A file system should not be mounted while > doing either of these. xfs_check will give false failures if it is run while > the file system is mounted. If everything was unmounted while you used these > utilities, then may be the disk is failing. At the moment, I don't know what > else to check. The filesystem was not mounted at the time I ran either xfs_check or xfs_repair, and the disk is not failing.

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Discuss February 2010