Discuss January 2008

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311 participants
383 discussions

Is it possible to install Fedora 8 kernel with CentOS 5.1 installation?
by Jean-Yves Avenard 05 Jan '08

05 Jan '08

Hi I've experienced crashes with all CentOS 5 kernel. I tried Fedora 8 and it runs fine.. So is there an easy way to install and run the Fedora 8 kernel on my CentOS 5.1 machine ? Thanks Jean-Yves

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Pidgin and (lack of) sound on CentOS 4.6
by Bart Schaefer 05 Jan '08

05 Jan '08

When I start pidgin from the Applications -> Internet -> Internet Messenger menu, my sound device stops working. I think this has something to do with the Gnome applet. I appear to end up with two (sometimes more) copies of the "gaim" process running -- such that if I use the right-button menu on the Gnome applet to quit pidgin, a login dialog is stil left behind and sometimes won't exit. I'm guessing these multiple gaim processes somehow deadlock the sound device, such that even after I kill them, no other process can play audio. Pidgin/gaim itself can't play sounds in this condition, either. I've tried using "lsof" to find all processes that have the sound device open and force them to exit or restart, but that doesn't help. Once the sound goes out, only a reboot brings it back. The flash and mplayer plugins for firefox/seamonkey are still able to play (silent) video in this condition, but starting up e.g. gmplayer blocks forever trying to open the sound device. Googling turned up this: http://blog.turbulentsky.com/2007/12/pidgin-has-no-sound-in-ubuntu-gutsy.ht… but I have no reason to be confident that would apply to CentOS. Searching on gaim instead of pidgin finds stuff that's four years old and almost certainly not relevant. Unfortunately I don't have much experience with audio apps on linux (or anywhere else, for that matter). I've never had any luck creating a .asoundrc or trying to get all my applications to agree on whether to use ALSA instead of OSS (although I take it OSS is pretty much obsolete now, I don't even know if the kernel in RHEL4 is recent enough to use ALSA by default). So if anyone has any clues to share on how to go about diagnosing this, I'd appreciate the help. Here are the sound-related modules from "lsmod": snd_intel8x0 36237 2 snd_ac97_codec 65425 1 snd_intel8x0 snd_pcm_oss 52729 0 snd_mixer_oss 21953 2 snd_pcm_oss snd_pcm 92485 2 snd_intel8x0,snd_pcm_oss snd_timer 28229 1 snd_pcm snd_page_alloc 14541 2 snd_intel8x0,snd_pcm gameport 8641 1 snd_intel8x0 snd_mpu401_uart 11457 1 snd_intel8x0 snd_rawmidi 28005 1 snd_mpu401_uart snd_seq_device 12105 1 snd_rawmidi snd 57765 11 snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,snd_mpu401_uart,snd_rawmidi,snd_seq_device soundcore 13089 2 snd Tell me what shovel to use, and I'll dig up any other system information that may be needed. Thanks in advance.

2 1

What's up with the mailing list spam?
by Matt Shields 05 Jan '08

05 Jan '08

Just this morning I've gotten 3 or 4 pieces of spam on the CentOS mailing list. -- -matt

15 19

GSL version >= 1.8 CentOS 4.x ?
by Adrian Sevcenco 05 Jan '08

05 Jan '08

Hi! Is there a version of gsl library >= 1.8 available for centos 4.x? If indeed there is none (as i founded nothing so far) has someone some idea how should i make the rpm from src.rpm ? Thank you, Best regards, Adrian

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RE: [CentOS] What's up with the mailing list spam?
by James D. Parra 04 Jan '08

04 Jan '08

>Please, no more GOD stuff..... > illicit mails, that include SPAM :-) > > So Admins GOD WORK! > > /Mats > > I believe he meant to type 'GOOD WORK'. No big deal. ~James

1 0

xen dependencies
by Joseph L. Casale 04 Jan '08

04 Jan '08

It appears that if I perform an install of CentOS 5.1 without changing *anything* in the options, then do a #yum groupinstall 'Virtualization' I can now get Xen to function in bridged mode (it has network connectivity). In lieu of this, can anyone shed some light on what dependency Xen has that is not installed when you do a completely bare install and execute a #yum install xen? I am hoping to finally end up with a minimum install of CentOS with Xen functioning without a gui or any additional services that won't be needed. Thanks! jlc

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John Rosatti, Excavators, 3D, NASA and Why Should I care?
by Super Star 04 Jan '08

04 Jan '08

John Rosatti, Excavators, 3D, NASA and Why Should I care? Well, because! There are two definitions for excavator; one is any person engaging in excavation is called an excavator. The second definition of excavator is, of course, the vehicles called excavators, which are sometimes called diggers, trackhoes, fronthoes, and 360-degree excavators or just 360. This is not to be confused with Microsoft's vertical technology and news search engine called Excavator or xcavator, as one has nothing to do with the other. Here we're talking about heavy duty digging machines, even though several manufacturers like John Deere, offer Compact, Midsize, and Large Excavators ranging from 0-6 metric tons for the compact excavators, 6 to 40 metric tons for the midsize, and 40 to 85 for large John Deere excavators. Additionally there exist mini-excavators, made by another manufacturer, that will fit through a door. In case you're now wondering what 3D and VRML, or actually x3D has to do with excavators, that is something we will be getting to in other articles, for right now you'll just have to trust that there is a fit. For now, however, let's get back to excavators, the digging machines used for, but not limited to: Digging, demolition, minning, river dredging, heavy lifting, and with hydraulic attachments, brush cutting. It is these same hydraulic attachments that have expanded the use of excavators, far beyond their original use of excavation such as the Low-energy Planetary Excavator (LPE) proposed by NASA. The latest paper to be found on this Nasa proposal is for 2006, so the current status can only be guessed at, nevertheless, the concept is certainly intriguing as are the LPE's possible commercial applications. Basically, The LPE would be a general-purpose machine with the ability to mine ice, regolith, and rock; it would also support construction activities. The purpose and application is meant for future manned and unmanned missions to the Moon, Mars, and beyond. .Additionally, adaptations could be made for use in extreme-low gravity such as on asteroids. This idea of efficient and reliable an excavator that has usage on differing planetary surfaces and various materials has the goal of enabling exploration and bases from outposts to self-sustaining complexes. The LPE would be able to accommodate the different materials that are encountered on planetary surfaces as the LPE would sense geologic changes and respond to them by using the lowest cutting energy possible. Moving on the to the possible non-NASA commercial application it can be said that the same qualities of the LPE that apply to space would also attract terrestrial users or said differently, us earth bound creatures. As both business and government markets rapidly expand, so does the need for urban infrastructure. Using NASA's own words on the subject; "Urban construction settings restrict the use of explosives, to minimize damaging vibrations, making mechanical methods attractive. In addition, shallow tunnel construction is rapidly changing from cut-and-cover to wholly underground, because excavations disrupt city traffic. Coupled with increasing population, these factors enhance the market for innovatively flexible systems such as the LPE".If I could have said it better than NASA did, I would have. But I couldn't, so I didn't. Anyway, there you have it, both the past of excavators and a look at their future with the development of the Low-energy Planetary Excavator JC Curran owns and operates Excavators Models

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cluster suite & gfs problem since update
by Doug Tucker 04 Jan '08

04 Jan '08

I have a cluster that has been operational for some time and functioning flawlessly until a recent yum update. The last unflawed working kernel was 2.6.9-55.0.12.ELsmp. The current kernel is 2.6.9-67ELsmp. The problem appears to be some type of infinite recovery loop of sorts. It runs find for a few minutes, then the service restarts itself. What I am seeing in /var/log/messages is: Jan 3 11:17:47 engrfs1 clurgmgrd: [5614]: <err> nfsclient:skynet_disted is missing! Jan 3 11:17:47 engrfs1 clurgmgrd[5614]: <notice> status on nfsclient:skynet_disted returned 1 (generic error) Jan 3 11:17:47 engrfs1 bash: [27695]: <info> Removing export: 129.119.113.108:/mnt/disted Jan 3 11:17:47 engrfs1 bash: [27695]: <info> Adding export: 129.119.113.108:/mnt/disted (rw) It does this for every client definition on the service. After it gets to the last one, it then restarts the serivce: Jan 3 11:16:25 engrfs1 clurgmgrd[5614]: <notice> Stopping service disted_export Jan 3 11:16:26 engrfs1 clurgmgrd: [5614]: <info> Removing IPv4 address 129.119.113.180 from et h0 Jan 3 11:16:36 engrfs1 clurgmgrd[5614]: <notice> Service disted_export is recovering Jan 3 11:16:36 engrfs1 clurgmgrd[5614]: <notice> Recovering failed service disted_export Then adds the exports and starts services again: Jan 3 11:16:36 engrfs1 clurgmgrd: [5614]: <info> Adding export: 129.119.113.108:/mnt/disted (r w) Jan 3 11:16:36 engrfs1 clurgmgrd: [5614]: <info> Adding IPv4 address 129.119.113.180 to eth0 Jan 3 11:16:37 engrfs1 clurgmgrd[5614]: <notice> Service disted_export started And then starts over at the beginning again continuously. This is a production system and this behaviour is causing the clients to hang (of course) during the restart. Thanks much for your help! Sincerely, Doug Tucker

1 1

Dump levels?
by Scott Ehrlich 04 Jan '08

04 Jan '08

I created a cron job to invoke a dump script according to Tower Of Hanoi. I am dumping a subdirectory and a filesystem. The backup script, with some other lines removed: /path/to/dump -0 -fv /dev/nst0 /var/log /path/to-dump -3 -fv /dev/nst0 /home When viewing the dump logs, it looks like it is taking the whole job as a level 0. Am missing something? Thanks. Scott

1 0

Backup
by Ruslan Sivak 04 Jan '08

04 Jan '08

We have a RHEL2 server that has had one of the drives in the raid array fail. I would like to do a full backup of the system before we replace the raided drive, in case the second drive decides to die during the procedure. What is the recommended way to back up a linux system? I was thinking of doing a snapshot, but the system is ext3 with no LVM. It has been suggested to hook up a usb drive and do an rsync of /. Are there any better solutions? The reason I wanted a snapshot is that I wanted to get an image of the disk, so that I wouldn't have to reinstall and reconfigure all the apps. Russ

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Discuss January 2008