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Re: [CentOS] [Newbie] Reclaiming /boot space
by Simon Matter 10 Mar '11

10 Mar '11

> On Wed, Mar 9, 2011 at 10:12 AM, Simon Matter <simon.matter(a)invoca.ch> > wrote: >>> Yes...thank you for the suggestion...since that was the cause of >>> my problem in the first place!! I should have known better; all >>> I had to do was remove some of the outdated kernel files. And >>> when I did the dumb thing of deleting the /boot files, they were >>> moved into the "protected" .Trash-boot directory. >> >> OK, now let us know exactly what you have. Is it CentOS 4 as I expected? >> If so, the listing of files in /boot should look like so: >> >> [root@abc ~]# ls -laR /boot/ >> /boot/: >> total 3771 >> drwxr-xr-x 4 root root 1024 Mar 3 11:31 . >> drwxr-xr-x 24 root root 4096 Mar 3 11:37 .. >> -rw-r--r-- 1 root root 51676 Feb 18 07:41 config-2.6.9-100.EL >> drwxr-xr-x 2 root root 1024 Mar 3 11:31 grub >> -rw-r--r-- 1 root root 1364958 Mar 3 11:20 initrd-2.6.9-100.EL.img >> drwx------ 2 root root 12288 Jul 8 2005 lost+found >> -rw-r--r-- 1 root root 9371 Aug 13 2006 message >> -rw-r--r-- 1 root root 9371 Aug 13 2006 message.ja >> -rw-r--r-- 1 root root 67797 Feb 18 07:41 symvers-2.6.9-100.EL.gz >> -rw-r--r-- 1 root root 770652 Feb 18 07:41 System.map-2.6.9-100.EL >> -rw-r--r-- 1 root root 1538264 Feb 18 07:41 vmlinuz-2.6.9-100.EL >> >> /boot/grub: >> total 198 >> drwxr-xr-x 2 root root 1024 Mar 3 11:31 . >> drwxr-xr-x 4 root root 1024 Mar 3 11:31 .. >> -rw-r--r-- 1 root root 82 Aug 9 2005 device.map >> -rw-r--r-- 1 root root 7956 Aug 9 2005 e2fs_stage1_5 >> -rw-r--r-- 1 root root 7684 Aug 9 2005 fat_stage1_5 >> -rw-r--r-- 1 root root 6996 Aug 9 2005 ffs_stage1_5 >> -rw------- 1 root root 589 Mar 3 11:31 grub.conf >> -rw------- 1 root root 593 Aug 9 2005 grub.conf.orig >> -rw-r--r-- 1 root root 7028 Aug 9 2005 iso9660_stage1_5 >> -rw-r--r-- 1 root root 8448 Aug 9 2005 jfs_stage1_5 >> lrwxrwxrwx 1 root root 11 Aug 9 2005 menu.lst -> ./grub.conf >> -rw-r--r-- 1 root root 7188 Aug 9 2005 minix_stage1_5 >> -rw-r--r-- 1 root root 9396 Aug 9 2005 reiserfs_stage1_5 >> -rw-r--r-- 1 root root 3605 Aug 13 2006 splash.xpm.gz >> -rw-r--r-- 1 root root 512 Aug 9 2005 stage1 >> -rw-r--r-- 1 root root 103816 Aug 9 2005 stage2 >> -rw-r--r-- 1 root root 7272 Aug 9 2005 ufs2_stage1_5 >> -rw-r--r-- 1 root root 6612 Aug 9 2005 vstafs_stage1_5 >> -rw-r--r-- 1 root root 9308 Aug 9 2005 xfs_stage1_5 >> >> /boot/lost+found: >> total 14 >> drwx------ 2 root root 12288 Jul 8 2005 . >> drwxr-xr-x 4 root root 1024 Mar 3 11:31 .. >> >> 1) I don't know which tool you have used to move things to "Trash" but >> you >> should be aware that it may well be the case that some permissions and >> or >> file types like symlinks may not be correct after recovering from >> "Trash". >> >> 2) The directory "lost+found" can be recreated using the command >> 'mklost+found' >> >> 3) I'm not sure on how to make grub work again, but maybe some steps qre >> required after copying everything back to /boot. I hope someone else can >> give you better info about this. >> >> Simon >> >> > > > Wouldn't it have been easier to reinstall the kernel & grub, i.e.: > > yum reinstall kernel grub > > Surely if yum reinstalls it, it would re-create the permissions & > symlinks as well? Yes, only that reinstall doesn't exist in EL4 :) Simon

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keepalived+LVS
by bedo 10 Mar '11

10 Mar '11

hello, all! if i want to use lvs function of keepalived , i must install ipvsadm ? tks!

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Re: [CentOS] Server hangs on CentOS 5.5
by Michael Eager 10 Mar '11

10 Mar '11

Rudi Ahlers wrote: > As far as I can see you were giving a bucked load of advice, which you > haven't even bothered to follow yet. You're the only one who could > actually do anything about the problem. I have followed quite a bit of the advice, which I have appreciated and noted. I've set up the monitor so that it will not be blanked on a crash, installed monitoring software, and checked a number of conditions which people have suggested. No, I have not responded to the philosophical discussions about vender management, nor to the suggestions to RMA something to somebody for unknown reasons. No, I'm not going to replace RAM or capacitors here and there on the off chance that something might be bad. (But I will look for capacitors which show signs of bulging or leaking.) > No amount of suggestions made on this list will fix the problem for > you. You need to actually take apart the server and see what's going > on. I wasn't interested in anyone fixing the server for me. I did ask for suggestions on how improve the diagnostics for the problem, which several people have responded to. Again, I appreciate their suggestions greatly. As I've said, I have a list of things to check when the server is next taken down. -- Michael Eager eager(a)eagercon.com 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077

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Re: [CentOS] Server hangs on CentOS 5.5
by Michael Eager 09 Mar '11

09 Mar '11

Rudi Ahlers wrote: > On Thu, Mar 10, 2011 at 12:31 AM, Michael Eager <eager(a)eagerm.com> wrote: >> Dr. Ed Morbius wrote: >> >>> If the issue is repeated but rare system failures on one of a set of >>> similarly configured hosts, I'd RMA the box and get a replacement. End >>> of story. >> I'll repeat: this is a house-made system. There's no vendor to RMA to. > > > > I don't know where you are, but in our country we can RMA anything and > everything. Apart from CPU's. So, even a cheap desktop mobo could be > RMA'd, as long as I can prove to the suppliers it's faulty, and it's > within the warrenty period I responded to Dr. Morbius' suggestion that I "RMA the box". There is vendor to RMA the box to. If I knew that it was a motherboard problem, I could RMA it. Or disk, or PSU, or network card, or whatever. But, as I've mentioned, there's no indication what causes the system to hang. There is no way at this point to prove that it is a defective motherboard. -- Michael Eager eager(a)eagercon.com 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077

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[Newbie] Reclaiming /boot space
by Todd Cary 09 Mar '11

09 Mar '11

When trying to do a yum update, I am told I need more space in /boot. When I check the contents of /boot (ls -l /boot), there are no files. If I do a df -h, there is no available space yet it shows that it has a lot of used space. The fstab shows the following: # This file is edited by fstab-sync - see 'man fstab-sync' for details /dev/VolGroup00/LogVol00 / ext3 defaults 1 1 LABEL=/boot /boot ext3 defaults 1 2 none /dev/pts devpts gid=5,mode=620 0 0 none /dev/shm tmpfs defaults 0 0 none /proc proc defaults 0 0 none /sys sysfs defaults 0 0 /dev/VolGroup00/LogVol01 swap swap defaults 0 0 /dev/hda /media/cdrom auto pamconsole,exec,noauto,managed 0 0 # fschk.ext3 /boot gives this error: The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> I am not sure what I should do next. Thank you in advance for any suggestions... Todd -- Ariste Software Petaluma, CA 94952 http://www.aristesoftware.com

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scanning under CentOS
by Boris Epstein 09 Mar '11

09 Mar '11

Hello listmates, I've got an HP Officejet 7110 All-in-One Printer which I am trying to get to scan for us. Details on the printer/scanner/FAX here: http://h10025.www1.hp.com/ewfrf/wc/product?cc=us&lc=en&dlc=en&product=91472 Now xsane seems to handle individual pages OK but multiplage scans through the ADF - that seems to be a complete mess. Hence the questions: 1) Is there a good scanner interface package that would allow me to just load the paper into the ADF, say "go" and watch the scanner go through the pages I've put in and produce an output file when it's done? 2) Has anyone worked with the scanner I am trying to use? What was your experience like when you did? Thanks. Boris.

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Security updates for CentOS-5
by Mark Foster 09 Mar '11

09 Mar '11

Hello, I was wondering why there haven't seemed to be any security updates for centos-5 since Jan 6. Per https://rhn.redhat.com/errata/rhel-server-errata.html there are a ton of outstanding issues. Thanks. -- Mark D. Foster <mark(a)foster.cc> http://mark.foster.cc/

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kernel vulnerabilities
by Riccardo Veraldi 09 Mar '11

09 Mar '11

Hello, I am using CentOS 5.5 I planned to update the kernel rpm because of vulnerabilities came out lately. The new redhat updated kernel would be 2.6.18-238.5.1.el5 Also Scientific Linux did and update to the kernels according to redhat advisories but I have seen that CentOS is still bound to kernel 2.6.18-194.32.1.el5 so no security update is available. I was wondering if this is normal or not. thank you Riccardo

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Re: [CentOS] Server hangs on CentOS 5.5
by Leen de Braal 09 Mar '11

09 Mar '11

> On Wed, Mar 9, 2011 at 10:24 AM, Leen de Braal <ldb(a)braha.nl> wrote: >>> m.roth(a)5-cent.us wrote: >>>> Michael Eager wrote: >>> >>>>> House-built, Gigabyte MB, AMD Phenom II X6, 6Gb RAM. >>>> >>>> Any chance the problem's with the video card? >>> >>> Video is on the MB. It doesn't seem likely that it's >>> the video, since the system doesn't respond to network >>> when it crashes. >>> >>> It could be anything. That's why I'm looking for >>> something that would give me a bit of a hint what >>> to look at. With an infrequent failure, it's not >>> practical to replace components piecemeal. >> >> While you open the case, check for the bulging capacitor problem. >> Will have the effect you describe, freezing up the system so that even >> bios routines don't work (your fans). >> If that's the case, replace mainboard. >> > > > Or replace the CAPS if you're not afraid of a soldering iron :) Very often resulting in a damaged board, because you damage the via's when pulling the caps. But it is worth a try. > > > > -- > Kind Regards > Rudi Ahlers > SoftDux > > Website: http://www.SoftDux.com > Technical Blog: http://Blog.SoftDux.com > Office: 087 805 9573 > Cell: 082 554 7532 > -- L. de Braal BraHa Systems NL - Terneuzen T +31 115 649333 F +31 115 649444

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/etc/hosts - hostname alias for 127.0.0.1
by Sean Carolan 09 Mar '11

09 Mar '11

Can anyone point out reasons why it might be a bad idea to put this sort of line in your /etc/hosts file, eg, pointing the FQDN at the loopback address? 127.0.0.1 hostname.domain.com hostname localhost localhost.localdomain

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