Discuss June 2008

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353 participants
415 discussions

Urgent Help Required!!!!!!!!!!!
by rajeev sharma 15 Jun '08

15 Jun '08

  Hi All,   I am Rajeev. I have download centOS 5.1 i386 files for installing Linux. I tried my ways but my DVD is not getting recognised while booting. I have windows XP SP2 32-bit. Let me know the files that need to be burned for installing centOS 5.1 i386.   Queries : 1. Whether I need to burn the files in CD or DVD? 2. I have download 9 iso files, 3 torrent files and 4 txt files from http://mirror.averse.net/centos/5.1/isos/i386/ Please tell me which files I need to burn? 3. If I need to burn more than 1 iso file, how do I do that? 4. How do I install the centOS 5.1 i386 when the system starts reading the CD or DVD? (The commands please) I am going to work in Linux from now on. This is very urgent. Please help me to learn Linux and discover new stuffs. Help is required urgently. Please help me.     Thanks & Regards, Rajeev       Meet people who discuss and share your passions. Go to http://in.promos.yahoo.com/groups/bestofyahoo/

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getting device to boot from thumb drive
by Jerry Geis 15 Jun '08

15 Jun '08

I have created a custom kernel as I needed to add floating point emulation to the kernel. I used the command below to create my initrd: mkinitrd --preload=ohci-hcd --preload=uhci-hcd --preload=ehci-hcd --preload=ext3 --preload=jbd --preload=scsi_mod --preload=sd_mod --preload=ata_piix --preload=libata /boot/initrd-2.6.9-67.ELmsgnet.img 2.6.9-67.ELmsgnet When I copy my vmlinuz and initrd to my ext partition of my thumbdrive I get the initial grub screen, centos starts booting, kernel starts uncompressing, I get the following: Unable to locate RDSP RedHat nash version 4.2.1.13 starting sda: assuming drive cache: write through sda: assuming drive cache: write through Then it just sits there. Nothing else happens. What might else I need to get this thumb drive booting? I compiled the kernel in i386 math emulation is the only items I changed. I started with i586. Thanks, Jerry

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Integrating squid with openldap on centos 5
by lingu 14 Jun '08

14 Jun '08

HI, I ma having squid proxy server ruuning on centos 5 , My set up : squid+squidguard+dansguardian working fine on user based acl using squidguard.I want to integrate squid with openldap for user authentication.so can you help me how to create a ldap users for squid authentication and what are all the changes i have to do in squid and squidguard..I am very much new to ldap concept. My requirement is very urgent if any one provide me the suitable document or link it wil be very usefull to me. Regards lingu

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cman stop failed
by Balaji 14 Jun '08

14 Jun '08

Dear All, I am using CentOS4 Update 3 Cluster Suite for i386 Architecture and my linux kernel version is 2.6.9-34.EL I have configured two node cluster My nodes are primary and secondary and I am using cluster to monitoring scripts During reboot or poweroff i am getting the problem is cman stop failed and I have verified the "/var/log/messages" log file and i getting the following messages Jun 12 18:34:13 primary cman: Stopping cman: Jun 12 18:34:16 primary cman: failed to stop cman failed Jun 12 18:34:16 primary cman: Jun 12 18:34:16 primary cman: Jun 12 18:34:16 primary rc: Stopping cman: failed We are not sure why this is happening. Can some one throw light on this. Regards -S.Balaji

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iptables starting while disabled
by Joseph L. Casale 14 Jun '08

14 Jun '08

I have a xen machine that has iptables turned off, and after a reboot it started behaving badly during times when network IO rose to anything other than almost nil. Since I know iptables makes xen unstable without some additional config and since its isolated I just have is disabled. As a result it was the last place I looked and spent the better half of the day chasing my tail. Somehow it gets turned on after a reboot, how can I deduce what is activating it? Thanks! jlc

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assigning "best" gateway and routing ---- Re: CentOS Digest, Vol 41, Issue 14
by Kevin Abbey 14 Jun '08

14 Jun '08

Hi, Regarding the discussion of gateways, Can the Vyatta routing software and/or hardware appliance solution help? (The software is open source and available.) http://www.vyatta.com/documentation/datasheet.php http://www.vyatta.com/documentation/general/Vyatta_FAQ.pdf http://www.vyatta.com/products/vyatta_software_datasheet.pdf http://www.vyatta.com/documentation/index.php Download http://www.vyatta.com/download/ I have not ye used this. I'd be interested to learn of others experiences with this. Kevin -- Kevin C. Abbey System Administrator BioMaPS Institute and Chemistry Department Rutgers University Piscataway, NJ 08854 CentOS Digest, Vol 41, Issue 14 Relevant emails only here: ------------------------------ Message: 2 Date: Fri, 13 Jun 2008 06:29:58 -0600 From: "Joseph L. Casale" <JCasale(a)activenetwerx.com> Subject: RE: [CentOS] assigning "best" gateway via DHCP To: 'CentOS mailing list' <centos(a)centos.org> Message-ID: <49627735003F5C479100225C339F9FE06FDCEE90BD(a)Mail.activenetwerx.int> Content-Type: text/plain; charset=us-ascii > >What might I do Linux-wise to create a "system" that looked at multiple > >gateways and then assigned (via DHCP) the gateway that was the least > >congested? > > > >Anyone have any good suggestions in this department? > Your assumption is that the level of congestion would remain unchanged for the length of the lease? Maybe an alternative is something that hands out one gateway then decides possibly what ip to masquerade with. jlc ------------------------------ ------------------------------ Message: 7 Date: Fri, 13 Jun 2008 09:52:03 -0700 From: Rogelio <scubacuda(a)gmail.com> Subject: Re: [CentOS] assigning "best" gateway via DHCP To: CentOS mailing list <centos(a)centos.org> Message-ID: <4852A5B3.3000603(a)gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Joseph L. Casale wrote: >> >> What might I do Linux-wise to create a "system" that looked at multiple >> >> gateways and then assigned (via DHCP) the gateway that was the least >> >> congested? >> >> >> >> Anyone have any good suggestions in this department? >> > > > > Your assumption is that the level of congestion would remain unchanged for the > > length of the lease? Maybe an alternative is something that hands out one gateway > > then decides possibly what ip to masquerade with. > This is a good idea, thanks. So, I'm assuming that you mean something like this? http://tldp.org/HOWTO/IP-Masquerade-HOWTO/ ------------------------------ Message: 8 Date: Fri, 13 Jun 2008 11:13:16 -0600 From: "Joseph L. Casale" <JCasale(a)activenetwerx.com> Subject: RE: [CentOS] assigning "best" gateway via DHCP To: CentOS mailing list <centos(a)centos.org> Message-ID: <49627735003F5C479100225C339F9FE06FDCEE6C1A(a)Mail.activenetwerx.int> Content-Type: text/plain; charset=us-ascii > >This is a good idea, thanks. So, I'm assuming that you mean something > >like this? > > > >http://tldp.org/HOWTO/IP-Masquerade-HOWTO/ > Yeah, I don't know how "sexy" the solution would be, but you could poll for throughput/availability with a script, then rewrite the iptables rule for example taking the new, preferred outside route as your new external IP to masq with. It would be functional, and given the external link your moving away from is likely down you probably don't have to worry about existing connections, or do you? :) Once you rewrite the rule and refresh it, current connections getting masq'ed will be killed. If your in the middle of secure connection to something/someone or a download, it will be terminated. There is *no* way of maintaining any connection between different paths in this situation unless you specifically have something setup with your provider that is aggregated across {n} connections, but then we wouldn't be discussing this:) jlc ------------------------------

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LVM and ext3 filesystem question
by Mag Gam 14 Jun '08

14 Jun '08

Can someone please explain what the purpose of stride is on ext3? I have been "googling" this for hours and wasn't really able to understand the underlying concepts. How does it fit with LVM, PV create's metablock size, and hardware RAID controller? TIA

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CentOS-announce Digest, Vol 40, Issue 7
by centos-announce-request＠centos.org 14 Jun '08

14 Jun '08

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-2008:0538 Important CentOS 3 x86_64 openoffice.org - security update (Tru Huynh) 2. CESA-2008:0538 Important CentOS 3 i386 openoffice.org - security update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Sat, 14 Jun 2008 10:53:54 +0200 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2008:0538 Important CentOS 3 x86_64 openoffice.org - security update To: centos-announce(a)centos.org Message-ID: <20080614085354.GB10994(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2008:0538 openoffice.org security update for CentOS 3 x86_64: https://rhn.redhat.com/errata/RHSA-2008-0538.html The following updated file has been uploaded and is currently syncing to the mirrors: x86_64: updates/x86_64/RPMS/openoffice.org-1.1.2-42.2.0.EL3.i386.rpm updates/x86_64/RPMS/openoffice.org-i18n-1.1.2-42.2.0.EL3.i386.rpm updates/x86_64/RPMS/openoffice.org-libs-1.1.2-42.2.0.EL3.i386.rpm source: updates/SRPMS/openoffice.org-1.1.2-42.2.0.EL3.src.rpm You may update your CentOS-3 x86_64 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

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enabling maildir @ cli
by Ray Leventhal 13 Jun '08

13 Jun '08

Hi all, I'm following a how-to for ISPConfig using CentOS5.1 and have run into the following instruction: ----- Dovecot uses Maildir format (not mbox), so if you install ISPConfig on the server, please make sure you enable Maildir under Management -> Server -> Settings -> Email. ISPConfig will then do the necessary configuration. ---- Since I'm ssh'd in to the box and X isn't installed, what's the CLI to accomplish this? Thanks in advance, -Ray

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TCP offload cards in linux
by nate 13 Jun '08

13 Jun '08

Anyone have experience with any? I've been having a real hard time finding info on any cards that actually support this under linux. (most of the cards work but I don't see drivers that actually offload the TCP stack) I have seen some comments where kernel developers don't like the idea as well. I'm running CentOS 4.6 64-bit on a dual proc quad core system with 8GB memory. I have a situation where I'm trying to make the most of my hardware here, a web application that serves up hundreds of tiny requests per second(each taking typically sub 100ms to complete). With my load balancer in it's "normal" mode I can pump about 1000 requests a second through the system, before exhausting the TCP stack on the server(all ~65k sockets in use). CPU usage tops out at about 75%. The "normal" mode terminates idle connections forcefully after 25 seconds. If I tell my load balancer to terminate idle connections *immediately* instead of waiting 25 seconds, I get similar CPU usage but transactions per second drop by about 30-33%. During my tests I've also gotten 4 kernel panics, the last two I have captured and they are virtually identical, with the exception of one time it panic's on the java process, another time it panics on the swapper process. Both times the load balancer was configured to terminate connections faster than 25 seconds. I've done several searches and can't find anything remotely related to the below panic. Kernel BUG at tcp_output:943 invalid operand: 0000 [1] SMP CPU 2 Modules linked in: dell_rbu md5 ipv6 autofs4 i2c_dev i2c_core nfs lockd nfs_acl sunrpc dm_mirror dm_mod joydev button battery ac uhci_hcd ehci_hcd hw_random shpchp bnx2 ext3 jbd ata_piix libata megaraid_sas sd_mod scsi_mod Pid: 10645, comm: java Not tainted 2.6.9-67.ELsmp RIP: 0010:[<ffffffff802e1a12>] <ffffffff802e1a12>{tcp_retransmit_skb+639} RSP: 0000:0000010006963e98 EFLAGS: 00010202 RAX: 00000101687cd9c0 RBX: 00000102266d2a80 RCX: 00000101687cd9c0 RDX: 00000101dec72e80 RSI: 0000000000000350 RDI: 0000000000000010 RBP: 000001015c0f7700 R08: 0000000000000008 R09: 0000000000000100 R10: 0000000000000000 R11: 0000000000000008 R12: 000001007b64ccb0 R13: 00000000000005b4 R14: 000001007b64ccb0 R15: 000001007b64c980 FS: 0000000048fe0960(005b) GS:ffffffff804f2e80(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000002adc82e028 CR3: 000000000694e000 CR4: 00000000000006e0 Process java (pid: 10645, threadinfo 0000010055cba000, task 000001005633c7f0) Stack: 0000010006963ec8 0000020000102a93 000001007b64ccb0 0000000000000001 000001007b64c980 0000000000000008 000001007b64ccb0 000001007b64ccb0 0000002c273fc4d0 ffffffff802e3f6d Call Trace:<IRQ> <ffffffff802e3f6d>{tcp_write_timer+1059} <ffffffff802e3b4a>{tcp_write_timer+0} <ffffffff80140945>{run_timer_softirq+356} <ffffffff8013cff0>{__do_softirq+88} <ffffffff8013d099>{do_softirq+49} <ffffffff80110bf5>{apic_timer_interrupt+133} <EOI> Code: 0f 0b 48 c1 34 80 ff ff ff ff af 03 48 8b 43 10 4c 63 f6 ff RIP <ffffffff802e1a12>{tcp_retransmit_skb+639} RSP <0000010006963e98> <0>Kernel panic - not syncing: Oops >From what I can tell the Broadcom chips in this server support TOE but the driver in linux does not implement it. I'd like to find a card that really has TOE in linux, if for nothing else to compare how it performs vs what I have now. With the goal of pumping out the highest number of transactions per second possible with the hardware/power utilization. thanks nate

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Discuss June 2008