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Re: Re: [CentOS] Changing from dynamic ip to static ip
by edukes＠alltel.net 13 Jun '06

13 Jun '06

> > From: "Joshua Gimer" <jgimer(a)gmail.com> > Date: 2006/06/13 Tue AM 08:39:36 EDT > To: "CentOS mailing list" <centos(a)centos.org> > Subject: Re: [CentOS] Changing from dynamic ip to static ip > > IPADDR=71.30.117.2 > NETMASK=255.255.255.252 > NETWORK=71.30.117.0 <http://71.30.117.0/30> > GATEWAY=71.30.117.1 > > Add this to your /etc/sysconfig/networking/devices/ifcfg-eth0 > And take out > > BOOTPROTO=dhcp Great! Thanks, Eddie > > On 6/13/06, Thomas E Dukes <edukes(a)alltel.net> wrote: > > > > > > > > > -----Original Message----- > > > From: centos-bounces(a)centos.org > > > [mailto:centos-bounces@centos.org] On Behalf Of William L. Maltby > > > Sent: Tuesday, June 13, 2006 7:41 AM > > > To: CentOS General List > > > Subject: Re: [CentOS] Changing from dynamic ip to static ip > > > > > > On Mon, 2006-06-12 at 18:53 -0400, Thomas E Dukes wrote: > > > > Hello, > > > > > > > > I have been on a dynamic ip for about 5 years and have just > > > upgraded > > > > to a static ip. > > > <snip> > > > > > > I almost didn't mention it because it's so common a concern > > > now, but just in case. > > > > > > Static IP gives attackers a lot more leeway in their attempts > > > to penetrate. Be sure your firewall (from ISP and iptables on CentOS > > > machine) are now appropriate for your situation. With port 80 > > > open, make sure your server stuff is kept up-to-date with > > > security fixes. Make sure all services not needed are > > > disabled. TCP wrappers (hosts.deny and > > > hosts.allow) are up to snuff. > > > > Hi Bill, > > > > Thanks, > > > > Yes, I have a firewall setup and also use denyhosts and fail2ban. > > > > Thanks > > > > > > HTH > > > -- > > > Bill > > > > > > > > > _______________________________________________ > > CentOS mailing list > > CentOS(a)centos.org > > http://lists.centos.org/mailman/listinfo/centos > > > > > > -- > Thx > Joshua Gimer > > _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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Centos 4.3 & drbd
by centos＠bathnetworks.com 12 Jun '06

12 Jun '06

Hiya, I'm new to Centos but learning rapidly but I have been using FreeBSD. I'm trying to setup a HA NFS server using 2 machines. Both machines are running 4.3 updated to the latest via Yum. I did yum groupinstall drbd-heartbeat and yum install kernel-module-drbd-kernel-module-drbd-2.6.9-34.EL to match my kernel. The problem I have is that on 1 machine drbd works fine, but when I start drbd on the other I get an error: Starting DRBD resources: [ d0 ioctl(,SET_DISK_CONFIG,) failed: Invalid argument Lower device is already mounted. cmd /sbin/drbdsetup /dev/drbd0 disk /dev/hde1 internal -1 failed! It is not mounted as far as I can tell - df -a only shows /dev/hda and fstab has no entry for /dev/hde1. I have also tried deleting the partion with parted and recreating it. I have also tried using just /dev/hde. The /etc/drbd.conf is: resource drbd0 { protocol C; on fs1.bathnetworks.local { device /dev/drbd0; disk /dev/hde1; address 10.0.0.1:7788; meta-disk internal; } on shorty.bathnetworks.local { device /dev/drbd0; disk /dev/hdc1; address 10.0.0.2:7788; meta-disk internal; } } fs1 is the machine I am having trouble with. Any help with fixing this would be appreciated. Rob

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even if I do not choose the Xwindows it still installs x ?
by Sentissi, Mohamed 12 Jun '06

12 Jun '06

Hello there I chose not to install the Xwindows and it still did ? a very minimal one (maybe xfce) any idea why ? I installed version 4 Thanks

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Root filesystem is suddenly mounted read-only
by Alfred von Campe 12 Jun '06

12 Jun '06

This is very strange. Everything was running fine Friday night. This morning I walk into work and find that my root file system (which is actually the only filesystem besides /boot) is not writable. Yet mount thinks it's mounted read/write: # mount /dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw) [snip] # touch foo touch: cannot touch `foo': Read-only file system Anyone else seen this? This is on a relatively recently fresh CentOS 4.3 install. Alfred

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Problems with csgfs after update
by C. L. Martinez 12 Jun '06

12 Jun '06

Hi all, Today I have update Centos cluster suite and my test cluster does not startup. When ccsd service tries to start returns this error: [root@srvimss1 lib]# ccsd Failed to connect to cluster manager. Hint: Magma plugins are not in the right spot. When I run magma_tools config plugindir returns me this setup: /lib/magma. This directory does not exists. How can I fix this problem??? Somebody have this problem?? Many thanks. -- C.L. Martinez clopmart(a)gmail.com

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Failed VNC Install
by Brett Serkez 11 Jun '06

11 Jun '06

Installing a new system, I launched the install: linux vnc I was then able to connect with a VNC client and run the install, really cool. All went well until the actual installation started. I saw the formatting of the swap partition, then the root file system and then I was suddenly disconnected. On the console was the following message: *** glibc detected *** double free or corruption (!prev): 0x09baf620 *** install exited abnormally Any ideas as to what to look for? Has anyone used the VNC installation with V4.3? Thanks! Brett

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Deleted my PATH
by Niels Przybilla 11 Jun '06

11 Jun '06

Hi, I have been logged in as root, and it seems to me that i destroyed all my PATh Variables. How can I restore them ? Thnaks for your help and best regards Niels

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PXE booting HP BL25p - Smart Array extended bios data area problem
by Miskell, Craig 11 Jun '06

11 Jun '06

Hi, I recently took delivery of a bunch of HP BL25p blades to add to my collection. I am attempting to install Centos4 x86_64 using PXE - the initial PXE DHCP stuff works, and the kernel and initrd are downloaded, but the server then immediately clears the screen and displays: "1706-Smart Array Controller Extended BIOS Data Area Memory Corrupted Array Controller Interrupt 14h BIOS Cannot Continue System Halted" It's pretty obvious what the problem probably is (the kernel nukes some bit of memory that it shouldn't, or that the smart array hasn't properly marked as reserved), but I don't know what to do to fix it. I have also tried: 1) The i386 kernel and initrd images 2) The RedHat AS4 kernel/initrd images 3) The Centos3 i386 kernel and initrd images 4) Downgrading the System ROM BIOS and Smart Array BIOS (as shipped it had the latest versions) to versions up to a year old. 5) Playing with memmap to exclude mem from 610-640K from being used by the kernel. Booting from CD works, but is suboptimal (I have to type the kernel kickstart options, and I don't want to have to do that 16 times, plus I want easy repeatability in future). Google has been fairly silent on the issue. Does anyone have any suggestions for what else I could try/prod/poke? Thanks, Craig Miskell, Technical Support, AgResearch Invermay 03 489-9279 "The two rules for success: 1. Don't tell people everything you know." - Anon. Please accept my abject apologies for the awful mess of a legal disclaimer which follows. Not my choice ;-( ======================================================================= Attention: The information contained in this message and/or attachments from AgResearch Limited is intended only for the persons or entities to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipients is prohibited by AgResearch Limited. If you have received this message in error, please notify the sender immediately. =======================================================================

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Old (really old) programs under CentOS.
by Lamar Owen 11 Jun '06

11 Jun '06

Ok, I have a small dilemma, and I'm hoping someone here has had to do this before. I have at a site (not PARI) a server running some mission critical software that was written in 1997 for libc5, under AOLserver 2.3. No, source code is not available for that version of AOLserver (it wasn't open-sourced until version 3.0, and the API changed rather dramatically at that point), not that it would help any, as gcc has undergone so many changes since RH5 that a recompile would be very difficult. The software is currently running on Redhat 5.2 (don't laugh; it's got a 2,716-day uptime right now! (yes, that's over 7 years!)) with the libc5 libs loaded. The server hardware is just about ready to fly apart, and I need to see about running this on more modern hardware. Of course, they already have bought the replacement server, a Dell PowerEdge 1850. No way RH 5.2 is going to load on a PE1850 with the megaraid PERC 4e/Si. Now, I've thought about a couple of possibilities: 1.) QEMU or VMware or similar running a RH5.2 instance under CentOS 4; 2.) Running a libc5 setup on CentOS 4. I'd rather do this, as security fixes would at least be available. Going back to a RH5 machine and working was a real trip; had to use telnet (no ssh on RH5); Kernel 2.0 is still there, no yum, no chkconfig/service subsystem, etc. The custom code is written specifically for AOLserver 2.3 in its tcl dialect and using API functions that don't exist in AOLserver 3.0 or later (or it would be a snap to compile AOLserver 4.0.10 on CentOS4 and roll); there's a couple hundred thousand lines of tcl code here, and while they will be contracting a replacement webapp using Plone/Zope, they aren't ready to transition as yet. -- Lamar Owen Director of Information Technology Pisgah Astronomical Research Institute 1 PARI Drive Rosman, NC 28772 828-862-5554 www.pari.edu

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Problem with dual-booting soft-RAID
by Kai Schaetzl 11 Jun '06

11 Jun '06

I set up IDE software-RAID on a test machine for testing the recover functionality. The problem is that it somehow won't boot after removing the first disk, although grub etc. seems to be setup okay. Here's some background: 2 disks hda and hdb RAID 1 setup: /dev/md0 (hda1 + hdb1) /boot /dev/md1 (hda2 + hdb2) / /dev/md2 (hda3 + hdb3) swap done with disk druid during initial setup from server disk, so far so good. Then I installed grub to hdb. grub-install complained all the time (I may have given it the wrong parameter), so I used grub directly: root (hd1,0) setup (hd1) That's correct, isn't it? (Is there a way to determine if grub is installed on the correct disk?) I added a third boot entry to the grub.conf (see below). I then removed disk 1 (hda) from the array by unpowering it and rebooted. Unfortunately, that sent me right in the BIOS PXE boot instead of trying the other disk, well, that's a BIOS problem. So I repowered disk 1 and rebooted. The grub on it is still working somehow but just fills the screen with "grub". So I moved disk 2 before disk 1 as a boot device in BIOS and tried again. This time I get a grub prompt. So, grub is obviously correctly installed on it. However, why doesn't it then boot? When I type in the exact same data that I have in grub.conf it boots. I resynced the disks now, but still can't boot normally. grub.conf is like this (taken from another non-RAID, full setup grub.conf and adjusted, so it differs cosmetically): default=0 fallback=2 timeout=10 #splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.9-34.0.1.EL) root (hd0,0) kernel /vmlinuz-2.6.9-34.0.1.EL ro root=/dev/md1 initrd /initrd-2.6.9-34.0.1.EL.img title CentOS-4 Server_CD (2.6.9-34.EL) root (hd0,0) kernel /vmlinuz-2.6.9-34.EL ro root=/dev/md1 initrd /initrd-2.6.9-34.EL.img title CentOS 2 (2.6.9-34.0.1.EL) root (hd1,0) kernel /vmlinuz-2.6.9-34.0.1.EL ro root=/dev/md1 initrd /initrd-2.6.9-34.0.1.EL.img When I change default to 2 it still doesn't boot, just gets me grub. I then reinstalled grub on the resynced hda with the same commands used earlier (adjusted for it, of course) and rebooted with hda as first boot disk. There's still the same behavior as before: booting from hda gives "grub grub grub ...". So, none of two boots like it should. disk 1 cannot boot at all, although resynced and disk 2 only manually. What could be the problem? Kai

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