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Two CentOS installations failed dual boot
by Amindeed 14 Jun '12

14 Jun '12

Hello everybody, I installed Centos 6.2 on a computer with an older version of it in order to dual boot both of them. I managed to install the new OS on a physically seperated hard drive, and configured grub to make the newly installed OS the default one. Now the older OS won't boot and this error message shows: *"error 13: invalid or unsupported executable format"*. I attached to the email the output of *"fdisk -l"* and a copy of the *"/etc/grub.conf"* configuration file. I have no experience dealing with boot/grub issues, so any help on this will be much appreciated. Regards.

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kvm CLI :: meaning of "vlan=" and "name=" options in -net nic and -net tap
by Arun Khan 14 Jun '12

14 Jun '12

Did not get any response in the CentOS Virt list. Posting in the CentOS General list hoping that some one here can provide clarification. Thx, -- Arun Khan ---------- Forwarded message ---------- From: Arun Khan Date: Tue, Jun 12, 2012 at 8:54 PM Subject: Meaning of "vlan=" and "name=" in Linux KVM To: CentOS Virt <centos-virt(a)centos.org> Greetings KVM gurus, I am trying to understand a "use case" scenario for the "vlan=n" option and "name=name" for the "-net nic" and "-net tap" directives. I have done some search but I have not come up with anything that sheds any light on the above. <quote from kvm man> Network options: -net nic[,vlan=n][,macaddr=mac][,model=type] [,name=name][,addr=addr][,vectors=v] Create a new Network Interface Card and connect it to VLAN n (n = 0 is the default). The NIC is an e1000 by default on the PC target. Optionally, the MAC address can be changed to mac, the device address set to addr (PCI cards only), and a name can be assigned for use in monitor commands. Optionally, for PCI cards, you can specify the number v of MSI-X vectors that the card should have; this option currently only affects virtio cards; set v = 0 to disable MSI-X. If no -net option is specified, a single NIC is created. Qemu can emulate several different models of network card. Valid values for type are "virtio", "i82551", "i82557b", "i82559er", "ne2k_pci", "ne2k_isa", "pcnet", "rtl8139", "e1000", "smc91c111", "lance" and "mcf_fec". Not all devices are supported on all targets. -net tap[,vlan=n][,name=name][,fd=h][,ifname=name] [,script=file][,downscript=dfile] Connect the host TAP network interface name to VLAN n, use the network script file to configure it and the network script dfile to deconfigure it. If name is not provided, the OS automatically provides one. fd=h can be used to specify the handle of an already opened host TAP interface. The default network configure script is /etc/qemu-ifup and the default network deconfigure script is /etc/qemu-ifdown. Use script=no or downscript=no to disable script execution. </quote from kvm man> My objective is to create a small "virtual" network using bridges/tap interfaces on the Host OS and running the Guest OSs (the network segment separated by vlan=somenumber) My hypothesis is that with "vlan=X" and "name=somename" the VMs can be separated into different segments i.e. a set of tap interfaces on vlan=10 and another set of tap interfaces on vlan=20 connected to the same bridge br0. I have two VMs started with "kvm -net tap,vlan=10" and "kvm -net tap,vlan=20" respectively but with IP numbers in the same subnet 172.16.0.0/24; they are able to ping each other with different "vlan" numbers. I would appreciate any clarification on the "vlan=" and "name=" options. Sample script for my KVM VMs <script> #!/bin/bash kvm \ -vga std \ -m 1024 \ -cpu core2duo \ -smp 2,cores=2 \ -drive file=/home/kvmusr/KVM/vdisks/centos62.img,index=0 \ -net nic,vlan=1,model=e1000,macaddr=${nic_mac_addr0} \ -net tap,vlan=1,ifname=tap0,script=no,downscript=no \ </script> Thanks, -- Arun Khan

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space problem
by m.roth＠5-cent.us 13 Jun '12

13 Jun '12

CentOS 6.2. I have a 2TB drive, one partition, which is used for online backups. It filled up the other day. I moved a couple of b/u directories off it, and deleted the originals, which should have given me 42G free. I also reduced the reserved blocks by 1/3rd. I've just finished an fsck, which it needed anyway, and in which there was a problem in an HTREE directory node. df *still* tells me that there are zero bytes free. Clues? mark

6 7

Update issue - tar package problem?
by Tom Brown 13 Jun '12

13 Jun '12

Hi Trying to apply all available updates to CentOS 5 and the following is observed # yum update Loaded plugins: downloadonly, fastestmirror, rhnplugin Loading mirror speeds from cached hostfile Setting up Update Process Resolving Dependencies --> Running transaction check <snip> --> Running transaction check ---> Package unixODBC-libs.i386 0:2.2.11-10.el5 set to be updated ---> Package unixODBC-libs.x86_64 0:2.2.11-10.el5 set to be updated --> Processing Dependency: /bin/tar for package: redhat-lsb --> Processing Dependency: /bin/tar for package: redhat-lsb --> Finished Dependency Resolution redhat-lsb-4.0-2.1.4.el5.x86_64 from installed has depsolving problems --> Missing Dependency: /bin/tar is needed by package redhat-lsb-4.0-2.1.4.el5.x86_64 (installed) redhat-lsb-4.0-2.1.4.el5.i386 from installed has depsolving problems --> Missing Dependency: /bin/tar is needed by package redhat-lsb-4.0-2.1.4.el5.i386 (installed) --> Running transaction check ---> Package kernel-xen.x86_64 0:2.6.18-194.32.1.el5 set to be erased ---> Package kernel-xen-devel.x86_64 0:2.6.18-194.32.1.el5 set to be erased --> Processing Dependency: /bin/tar for package: redhat-lsb --> Processing Dependency: /bin/tar for package: redhat-lsb --> Finished Dependency Resolution redhat-lsb-4.0-2.1.4.el5.x86_64 from installed has depsolving problems --> Missing Dependency: /bin/tar is needed by package redhat-lsb-4.0-2.1.4.el5.x86_64 (installed) redhat-lsb-4.0-2.1.4.el5.i386 from installed has depsolving problems --> Missing Dependency: /bin/tar is needed by package redhat-lsb-4.0-2.1.4.el5.i386 (installed) Error: Missing Dependency: /bin/tar is needed by package redhat-lsb-4.0-2.1.4.el5.i386 (installed) Error: Missing Dependency: /bin/tar is needed by package redhat-lsb-4.0-2.1.4.el5.x86_64 (installed) You could try using --skip-broken to work around the problem You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest so trying to just update tar # yum update tar Loaded plugins: downloadonly, fastestmirror, rhnplugin Loading mirror speeds from cached hostfile Setting up Update Process Resolving Dependencies --> Running transaction check ---> Package tar.x86_64 2:1.15.1-32.el5_8 set to be updated --> Processing Dependency: /bin/tar for package: redhat-lsb --> Processing Dependency: /bin/tar for package: redhat-lsb --> Finished Dependency Resolution redhat-lsb-4.0-2.1.4.el5.x86_64 from installed has depsolving problems --> Missing Dependency: /bin/tar is needed by package redhat-lsb-4.0-2.1.4.el5.x86_64 (installed) redhat-lsb-4.0-2.1.4.el5.i386 from installed has depsolving problems --> Missing Dependency: /bin/tar is needed by package redhat-lsb-4.0-2.1.4.el5.i386 (installed) Error: Missing Dependency: /bin/tar is needed by package redhat-lsb-4.0-2.1.4.el5.i386 (installed) Error: Missing Dependency: /bin/tar is needed by package redhat-lsb-4.0-2.1.4.el5.x86_64 (installed) You could try using --skip-broken to work around the problem You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest but interestingly if i yum locainstall the tar package and then yum update it all works fine - seems very odd and possibly a broken yum package as rpm works OK ? anyone seen this? thanks

4 14

set perms on ttyUSB
by Steve Clark 13 Jun '12

13 Jun '12

Hello, CentOS 6.2. I have spent all morning googling and trying different things to get the permissions on my ttyUSB0 port set correctly using udev. I am at my wits end. Why is this so convoluted!? I would really appreciate it if someone could tell me how to do this. The default permissions come up 660 root,dialout. I have tried adding myself to group dialout but still get permission denied when I run minicom. The only thing that works is sudo -i then chmod 666 /dev/ttyUSB0. Thanks in advance. -- Stephen Clark *NetWolves* Director of Technology Phone: 813-579-3200 Fax: 813-882-0209 Email: steve.clark(a)netwolves.com http://www.netwolves.com

2 2

CentOS-announce Digest, Vol 88, Issue 8
by centos-announce-request＠centos.org 13 Jun '12

13 Jun '12

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-2012:0721 Important CentOS 5 kernel Update (Johnny Hughes) 2. CEBA-2012:0726 CentOS 5 rp-pppoe FASTTRACK Update (Johnny Hughes) 3. CEBA-2012:0728 CentOS 6 lldpad Update (Johnny Hughes) 4. CEBA-2012:0727 CentOS 6 libvirt Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Wed, 13 Jun 2012 00:11:19 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2012:0721 Important CentOS 5 kernel Update To: centos-announce(a)centos.org Message-ID: <20120613001119.GA12540(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2012:0721 Important Upstream details at : https://rhn.redhat.com/errata/RHSA-2012-0721.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: cbb4a31da293e11c165753949275e557ed989f83ed5bd9ff1bdd5da31d80c636 kernel-2.6.18-308.8.2.el5.i686.rpm ea33676e3b72e3d74bc67538abf4eb261f43236ff5624fe8f95d8743d7eae448 kernel-debug-2.6.18-308.8.2.el5.i686.rpm 88b655d8310f7dcb5db276de5755d67c7538798aa2fcdf13a44a8625471f0c1f kernel-debug-devel-2.6.18-308.8.2.el5.i686.rpm 4ea808bd8ca6a90bf6f8c9d0ba6a2cb9ff24cda84c0729ba6f1b11a2663d10f4 kernel-devel-2.6.18-308.8.2.el5.i686.rpm 409ea419465826ecc3e8f5ca226fc862cc4b058adb725c84e9c4c68390f8c8de kernel-doc-2.6.18-308.8.2.el5.noarch.rpm 9052b183ff52d80f67a7b52663f761cc9d6cfd1db480ba6ed5b38f15982a6e23 kernel-headers-2.6.18-308.8.2.el5.i386.rpm 0b04d3a84ce29460b545f03102422dfbfa5e0d6f5c320f0c86ad83be513b81f3 kernel-PAE-2.6.18-308.8.2.el5.i686.rpm ed3b3cb0f95ad5217c04d5e0cb53975ebd87b0bd0971b169f41ae3f4313578ea kernel-PAE-devel-2.6.18-308.8.2.el5.i686.rpm e2d5facb99b47f353e485bdac3dd270d1e4b2b1a13407d00161b5fb9d41566bc kernel-xen-2.6.18-308.8.2.el5.i686.rpm 14a82f4c262215b67d7c7c6d22c0fa32ba65ade61b80c728c166b43ddc00b26f kernel-xen-devel-2.6.18-308.8.2.el5.i686.rpm x86_64: d936dd354fd9fbb409ddf415ad7ea87d3b9870e419e58e7925a50d0cc3889713 kernel-2.6.18-308.8.2.el5.x86_64.rpm da112881ff2dd48d45349d0997ebc0cdfe53dcaa078c6f34055c488a61222452 kernel-debug-2.6.18-308.8.2.el5.x86_64.rpm 4e3d65f7dab2055f0fc732f4192a1d0e4e41abff7e75f1afc85c24cb24ebd0e4 kernel-debug-devel-2.6.18-308.8.2.el5.x86_64.rpm 1086c971fc75d89bfd0fcbda8e31cd807a922324e97697bc7adfe6928db068cd kernel-devel-2.6.18-308.8.2.el5.x86_64.rpm 409ea419465826ecc3e8f5ca226fc862cc4b058adb725c84e9c4c68390f8c8de kernel-doc-2.6.18-308.8.2.el5.noarch.rpm 408dd016c3f0d2efce0b27ea4b7a77505313d70bf9089528058f3e20576e4a89 kernel-headers-2.6.18-308.8.2.el5.x86_64.rpm a2073516d8ac0ebceae4668bd4036a3dad6ea743210794a3bed4678b1a07d6a2 kernel-xen-2.6.18-308.8.2.el5.x86_64.rpm a1b45d66a1bf5ede91d5ba6e09adfac4238db01cee71267c2dc5f55d27d78452 kernel-xen-devel-2.6.18-308.8.2.el5.x86_64.rpm Source: e0fb314918e345984377ba34aa77aaf1dc5420c1e203e721c16068c8af94b817 kernel-2.6.18-308.8.2.el5.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Wed, 13 Jun 2012 10:32:10 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2012:0726 CentOS 5 rp-pppoe FASTTRACK Update To: centos-announce(a)centos.org Message-ID: <20120613103210.GA10978(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2012:0726 Upstream details at : http://rhn.redhat.com/errata/RHBA-2012-0726.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 94e78d77c3dbd7ec9d26ba22e2f3bf4d7952721088cdc6a1999ec274f387cb20 rp-pppoe-3.5-33.el5.i386.rpm x86_64: 53330ac8981cae9f1c865748c15fbbf4b0ef4b5bc1dca67114b78e504bbc6230 rp-pppoe-3.5-33.el5.x86_64.rpm Source: 39e1deac26fe937f15b11b39314aea99e699c7baea92775ff38151ea4053d0e2 rp-pppoe-3.5-33.el5.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 3 Date: Wed, 13 Jun 2012 11:41:40 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2012:0728 CentOS 6 lldpad Update To: centos-announce(a)centos.org Message-ID: <20120613114140.GA14036(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2012:0728 Upstream details at : https://rhn.redhat.com/errata/RHBA-2012-0728.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 339e7605435efa7e396ea3847423c1f07ab97127eb9c6b9c78f3febbb8b90379 lldpad-0.9.43-13.el6_2.1.i686.rpm 990c0a640ef549a5591785924217a0e7d3fef29d32762536b4d6fd447c41c578 lldpad-devel-0.9.43-13.el6_2.1.i686.rpm x86_64: 644429083a3f7c83f4625a8c8d0a437ea832beb8be11c5a7314a596d27f5edbc lldpad-0.9.43-13.el6_2.1.x86_64.rpm 990c0a640ef549a5591785924217a0e7d3fef29d32762536b4d6fd447c41c578 lldpad-devel-0.9.43-13.el6_2.1.i686.rpm 38bc3140c4bb59d5af357ba32d607535a620c171e5c55b3be52418e5fcfcecb8 lldpad-devel-0.9.43-13.el6_2.1.x86_64.rpm Source: c3675b921957105d790e83ae472cc41e331dd25a2f8b3f82d7e7b7805645da74 lldpad-0.9.43-13.el6_2.1.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 4 Date: Wed, 13 Jun 2012 11:42:02 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2012:0727 CentOS 6 libvirt Update To: centos-announce(a)centos.org Message-ID: <20120613114202.GA14134(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2012:0727 Upstream details at : https://rhn.redhat.com/errata/RHBA-2012-0727.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 5b9fcf47f972fd4adf41cc291f89742548b5ff2c027c557c9d2f927b908ff596 libvirt-0.9.4-23.el6_2.9.i686.rpm 3eb3114dfe344be41d14358d40dd971186ecff2be997a51de71e3bf7a1b84693 libvirt-client-0.9.4-23.el6_2.9.i686.rpm b162137c4c94125ffdf9a65f9abf3aa8ac15df2fef50f14932e57ec63ac69521 libvirt-devel-0.9.4-23.el6_2.9.i686.rpm ddca258668682089f7bdbe778879d5d9241e5bbb5f6eced34d678a45be76326e libvirt-lock-sanlock-0.9.4-23.el6_2.9.i686.rpm 27ddf40fbad733d7005471a9cd22ac3e7d2a736dedc5c18f8326b5c124a7964a libvirt-python-0.9.4-23.el6_2.9.i686.rpm x86_64: 462ee31b8eed28eaf3e4c20656ee4337474b5401795dd3dbc20ab995d4bcf59b libvirt-0.9.4-23.el6_2.9.x86_64.rpm 3eb3114dfe344be41d14358d40dd971186ecff2be997a51de71e3bf7a1b84693 libvirt-client-0.9.4-23.el6_2.9.i686.rpm 1bf232b9c6c5edd5323cc253c88b63d0e4861385023c33712a7351ef8ad943d8 libvirt-client-0.9.4-23.el6_2.9.x86_64.rpm b162137c4c94125ffdf9a65f9abf3aa8ac15df2fef50f14932e57ec63ac69521 libvirt-devel-0.9.4-23.el6_2.9.i686.rpm d7e3d9e0dce6fc30b107566837d3bc3ffdc4bd440cb18c26278004583f705d8c libvirt-devel-0.9.4-23.el6_2.9.x86_64.rpm cdb8c39425c016ebadb926465edb68e42579400954eca7960fab1e336f94a342 libvirt-lock-sanlock-0.9.4-23.el6_2.9.x86_64.rpm 1e9ee98cc15cefa006dc93c5a30a635efa41dea1db10be6c443f7214266cf132 libvirt-python-0.9.4-23.el6_2.9.x86_64.rpm Source: fa243eebe97817109f2263a3f72cbc44468f7dd7457ba0f1e13881597289898e libvirt-0.9.4-23.el6_2.9.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 88, Issue 8 **********************************************

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yum install, and exit status
by Philippe Naudin 13 Jun '12

13 Jun '12

Hello, IIRC, the exit status of "yum install foo bar" was (long ago !) 0 only if foo *and* bar could be installed. Nowadays, it is 0 if foo *or* bar (or both) are correctly installed. Is there a way to get the old behavior ? Thanks, -- Philippe Naudin

1 0

Help with smartd
by Jerry Geis 13 Jun '12

13 Jun '12

I have a system that is logging: smartd /dev/sda currently unreadble (pending) sectors smartd /dev/sda offline uncorrectable sectors The box continues to run fine. Doing "smartctl -H /dev/sda" says: test result: PASSED I have ran the "smartctl -t offline /dev/sda", after the 300+ seconds I rebooted and waited about 30 minutes and again got the above error, and smartctl -H says PASSED. How do I tell smartctl to just not use the sectors its finding bad and move on? Thanks, Jerry

1 0

Re: [CentOS] php4 under Centos6
by Michael Kress 13 Jun '12

13 Jun '12

Am 12.06.2012 22:39, schrieb Reindl Harald: > Am 12.06.2012 22:19, schrieb Michael Kress: >> Hello, is there any way of getting php4 installed on Centos6? I'd like >> to install it in an apache/fastcgi environment. >> Has anybody got a link to a description/howto describing a clean install? >> I failed compiling the original php4 tar ball and failed relocating the >> php binary. > PHP4 IS DEAD SINCE A LONG TIME > > DO NOT USE PHP4 - THROW AWAY CRAP WHICH DOES NOT > WORK WITH PHP5 BECAUSE IT IS UNMAINTAINED AND > UNSECURE > oh yes, forgot the disclaimer with the above text. Regards Michael -- Michael Kress, kress(a)hal.saar.de http://www.michael-kress.de / http://kress.net P E N G U I N S A R E C O O L

2 1

Network Device control by Virtual host - Possibility & Security - Centos 6.2
by Sanjay Arora 13 Jun '12

13 Jun '12

Is it possible to pass the Network port to a virtual host and have a minimal Firewall, IDS/IPS install there and this virtual host to be the Gateway to the Network for the host as well as other virtual hosts? I am talking specifically Centos 6.2 & KVM/Xen. Also, what harware requirements need to be met. And most of all what security implications. Normally minimal software at the perimeter of the host should be a positive, but does virtualization impose any weaknesses? Rgds. Sanjay.

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