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34753 discussions

slowness with new kernel+nouveau?
by Darod Zyree 16 Aug '12

16 Aug '12

Hello, New kernel version 2.6.32-279.2.1.el6.x86_64 in combination with xorg-x11-drv-nouveau Version:0.0.16 is somehow painfully slow on my laptop. during start up it takes almost half a minute for gnome login to appear. After having logged in the following happens: - gnome top and bottom panels "slide/crawl" in to view one pixel line at a time. - starting the terminal takes much more time, 10-15, sometimes even up to 20 seconds. - Firefox also takes much longer to start. Removing xorg-x11-drv-nouveau seems to resolve this "slowness" but then my attached monitor does not work. Anyone else experiencing this issue or know how to fix/troubleshoot? -- Regards, Darod Zyree

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samba problem with kernel 2.6.32-279.*
by Mogens Kjaer 16 Aug '12

16 Aug '12

Hello, We use Norton Ghost, running in a PXE booted DOS, to handle Windows XP images. The images are stored on a samba share on our CentOS 6 server. This has worked without any problems for years. After kernel 2.6.32-279* it has stopped working. The symptom is that if I boot in DOS, and do: net use x: \\myserver\ghostimages dir x: I get an infinite loop where the first file name is listed again and again. Going back to kernel-2.6.32-220.17.1 on the server fixes the problem. The problem exist with kernel-2.6.32-279, kernel-2.6.32-279.2.1, and kernel-2.6.32-279.5.1. Samba is version samba-3.5.10-125, the server is x86_64. Where should I look for a solution to that problem on the newer kernels? Mogens -- Mogens Kjaer, mk(a)lemo.dk http://www.lemo.dk

2 4

dependency issue
by Steve Clark 16 Aug '12

16 Aug '12

Hello List, I am trying to install php-snmp into my CentOS 6.2 system and it doesn't work, and I am not sure why. It looks like it is trying to install php-snmp from 6.3. Error: Package: php-snmp-5.3.3-14.el6_3.i686 (updates) Requires: php-common = 5.3.3-14.el6_3 Installed: php-common-5.3.13-1.el6.i686 (@anaconda-CentOS-201112130233.i386/6.2) Also why wouldn't 5.3.13-1 be a higher revision than 5.3.3-14? [root@Z703108 ~]# cat /etc/redhat-release CentOS release 6.2 (Final) [root@Z703108 ~]# yum clean all Loaded plugins: fastestmirror Cleaning repos: base cr elrepo epel extras rpmforge updates Cleaning up Everything Cleaning up list of fastest mirrors [root@Z703108 ~]# rpm -qa | grep php php-5.3.13-1.el6.i686 php-pgsql-5.3.13-1.el6.i686 php-common-5.3.13-1.el6.i686 php-ldap-5.3.13-1.el6.i686 php-cli-5.3.13-1.el6.i686 php-pdo-5.3.13-1.el6.i686 [root@Z703108 ~]# yum --disablerepo=\* --enablerepo=base,updates update php Loaded plugins: fastestmirror Determining fastest mirrors * base: centos.digitalcompass.net * updates: centosmirror.quintex.com base | 3.7 kB 00:00 base/primary_db | 3.5 MB 00:24 updates | 3.5 kB 00:00 updates/primary_db | 1.7 MB 00:11 Setting up Update Process No Packages marked for Update [root@Z703108 ~]# yum --disablerepo=\* --enablerepo=base,updates install php-snmp Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: centos.digitalcompass.net * updates: centosmirror.quintex.com Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package php-snmp.i686 0:5.3.3-14.el6_3 will be installed --> Processing Dependency: php-common = 5.3.3-14.el6_3 for package: php-snmp-5.3.3-14.el6_3.i686 --> Finished Dependency Resolution Error: Package: php-snmp-5.3.3-14.el6_3.i686 (updates) Requires: php-common = 5.3.3-14.el6_3 Installed: php-common-5.3.13-1.el6.i686 (@anaconda-CentOS-201112130233.i386/6.2) php-common = 5.3.13-1.el6 Available: php-common-5.3.3-3.el6_2.8.i686 (base) php-common = 5.3.3-3.el6_2.8 Available: php-common-5.3.3-14.el6_3.i686 (updates) php-common = 5.3.3-14.el6_3 You could try using --skip-broken to work around the problem -- 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 1

Extract lines from text file
by Tony Molloy 16 Aug '12

16 Aug '12

Hi, I'm looking for a command to extract lines from a large text file, a password file. A typical user has a username made from a letter followed by their id-number. m9718508:pw:9301:840: Lynch :/home/pgstud/m9718508:/bin/bash So for instance if I need to extract lines where; the 1st field, the username begins with an m and the 4th field, the group contains exactly 850 cat passwdfile | grep ^m | grep 850 > output is close but fails if the value 850 appears outside the 4th field. In the above example which should be ignored 850 appears in the username and home directory and is therefore extracted. Any ideas. Thanks, Tony

9 15

IPv6 on Centos 6
by Alan Batie 16 Aug '12

16 Aug '12

We've been running ipv6 for a year or so now, but some of our newer instances (all on an ESX cluster) are not working. It looks like it's all of our Centos 6 instances. I'm hoping someone can point me in the right direction... tshark indicates that it's neighbor discovery that's failing: <centos666.peak.org> [26] # cat ../network NETWORKING=yes HOSTNAME=centos666.peak.org GATEWAY=207.55.16.1 NETWORKING_IPV6=yes IPV6_AUTOTUNNEL=no IPV6_DEFAULTGW=2607:f678::1 <centos666.peak.org> [27] # cat ifcfg-eth0 DEVICE="eth0" NM_CONTROLLED="no" ONBOOT="yes" TYPE=Ethernet BOOTPROTO=none IPADDR=207.55.16.66 PREFIX=22 GATEWAY=207.55.16.1 DNS1=69.59.192.71 DNS2=69.59.192.72 DOMAIN=peak.org DEFROUTE=yes IPV6INIT=yes NAME="System eth0" IPV6_AUTOCONF=no IPV6ADDR=2607:f678::16:66/64 IPV6_DEFROUTE=yes <centos666.peak.org> [28] # ifconfig eth0 Link encap:Ethernet HWaddr 00:50:56:98:70:8B inet addr:207.55.16.66 Bcast:207.55.19.255 Mask:255.255.252.0 inet6 addr: fe80::250:56ff:fe98:708b/64 Scope:Link inet6 addr: 2607:f678::16:66/64 Scope:Global UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1862 errors:0 dropped:0 overruns:0 frame:0 TX packets:266 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:136703 (133.4 KiB) TX bytes:33944 (33.1 KiB) ipv6 is working locally: <centos666.peak.org> [29] # ping6 2607:f678::16:66 PING 2607:f678::16:66(2607:f678::16:66) 56 data bytes 64 bytes from 2607:f678::16:66: icmp_seq=1 ttl=64 time=0.040 ms 64 bytes from 2607:f678::16:66: icmp_seq=2 ttl=64 time=0.038 ms ^C --- 2607:f678::16:66 ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1870ms rtt min/avg/max/mdev = 0.038/0.039/0.040/0.001 ms but not on the lan: <centos666.peak.org> [5] # ping6 2607:f678::1 PING 2607:f678::1(2607:f678::1) 56 data bytes >From 2607:f678::16:66 icmp_seq=2 Destination unreachable: Address unreachable >From 2607:f678::16:66 icmp_seq=3 Destination unreachable: Address unreachable >From 2607:f678::16:66 icmp_seq=4 Destination unreachable: Address unreachable >From 2607:f678::16:66 icmp_seq=6 Destination unreachable: Address unreachable >From 2607:f678::16:66 icmp_seq=7 Destination unreachable: Address unreachable >From 2607:f678::16:66 icmp_seq=8 Destination unreachable: Address unreachable ^C --- 2607:f678::1 ping statistics --- 8 packets transmitted, 0 received, +6 errors, 100% packet loss, time 7892ms tshark for that ping: <centos666.peak.org> [38] # tshark -n -i eth0 ip6 Running as user "root" and group "root". This could be dangerous. Capturing on eth0 0.000000 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation 1.000019 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation 2.000043 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation 4.001030 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation 5.001076 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation 6.001045 2607:f678::16:66 -> ff02::1:ff00:1 ICMPv6 Neighbor solicitation ^C6 packets captured A centos 5.8 vm with the same virtual network connections works fine: <ns6.peak.org> [103] # ping6 2607:f678::1 PING 2607:f678::1(2607:f678::1) 56 data bytes 64 bytes from 2607:f678::1: icmp_seq=0 ttl=64 time=1.34 ms 64 bytes from 2607:f678::1: icmp_seq=1 ttl=64 time=0.894 ms 64 bytes from 2607:f678::1: icmp_seq=2 ttl=64 time=0.871 ms --- 2607:f678::1 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2001ms rtt min/avg/max/mdev = 0.871/1.035/1.342/0.219 ms, pipe 2 <ns6.peak.org> [104] # ping6 ipv6.google.com PING ipv6.google.com(pz-in-x67.1e100.net) 56 data bytes 64 bytes from pz-in-x67.1e100.net: icmp_seq=0 ttl=52 time=14.1 ms 64 bytes from pz-in-x67.1e100.net: icmp_seq=1 ttl=52 time=14.3 ms 64 bytes from pz-in-x67.1e100.net: icmp_seq=2 ttl=52 time=14.3 ms --- ipv6.google.com ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2001ms rtt min/avg/max/mdev = 14.185/14.296/14.380/0.081 ms, pipe 2 <ns6.peak.org> [489] # tshark -i eth0 -n ip6 Running as user "root" and group "root". This could be dangerous. Capturing on eth0 0.000000 2607:f678::56 -> 2607:f678::1 ICMPv6 Echo request 0.000720 2607:f678::1 -> 2607:f678::56 ICMPv6 Echo reply 1.000990 2607:f678::56 -> 2607:f678::1 ICMPv6 Echo request 1.001759 2607:f678::1 -> 2607:f678::56 ICMPv6 Echo reply 2.001004 2607:f678::56 -> 2607:f678::1 ICMPv6 Echo request 2.001841 2607:f678::1 -> 2607:f678::56 ICMPv6 Echo reply 3.002983 2607:f678::56 -> 2607:f678::1 ICMPv6 Echo request 3.003680 2607:f678::1 -> 2607:f678::56 ICMPv6 Echo reply 4.003991 2607:f678::56 -> 2607:f678::1 ICMPv6 Echo request 4.010478 2607:f678::1 -> 2607:f678::56 ICMPv6 Echo reply 4.650129 2607:f678::1 -> 2607:f678::56 ICMPv6 Neighbor solicitation 4.650171 2607:f678::56 -> 2607:f678::1 ICMPv6 Neighbor advertisement 12 packets captured

4 14

Good Anti-virus for Linux desktops and servers
by Gregory Machin 15 Aug '12

15 Aug '12

Hi. I'm look for an enterprise quality Anti-virus / Malware for my Linux machines . Mostly Ubuntu on the desktop, CentOS and RHEL servers. I must have real time scanning, on demand scanning, and centralized management. Is there anything out there that can do this ? GM

11 21

Strange issue with system time being off
by Russell Jones 15 Aug '12

15 Aug '12

Hi all, I am having an issue with some older CentOS 5.3 servers. Every time the server boots, it gives the error "Cannot access the hardware clock by any known method", and then promptly sets the time 5 hours behind the hardware clock, down to the second. After the system is up. "hwclock" works fine. hwclock --debug does not show any error at all. The hardware clock is configured in local time. /etc/sysconfig/clock is set to UTC=false and ZONE="America/Chicago". /etc/localtime is a copy of Chicago's zone file. /etc/adjtime is configured with "LOCAL" as the third row. I am at a loss as to what is causing this. Any assistance is appreciated! Thanks!

10 24

how best to rollback from a yum update?
by Jon Detert 15 Aug '12

15 Aug '12

Suppose I want to upgrade a bunch of packages on a system, but in case the upgrade produces unexpected, undesired results, I want to be able to rollback the system to its original state. What is the best way to do that? Often, I won't have, or be able to find, packages for the current installed versions. I.e. If I haven't upgraded postgres for 2 years, it may be that I can no longer find a package for the version I am currently running. The 'rollback' feature of rpm and yum [1] looks promising, but I have a few concerns with it: a) why isn't the --rolback switch described in either the man page for rpm or the output from --help? This makes me think the --rollback switch is deprecated or otherwise unofficial. b) how can I trim/purge the 'repackaged' rpms that by default go in /var/spool/repackage [2]? I don't want to just leave them there forever, but if I trim/purge/delete them, how will the rpm database be updated to know that it can no longer rollback to the date that they were installed? AtDhVaAnNkCsE [1] http://www.freedomit.co.nz/kb-centos/enabling-yum/rpm-rollback [2] http://www.linuxjournal.com/article/7034?page=0,1 -- Jon Detert Sr. Systems Administrator Infinity Healthcare Milwaukee, Wisconsin 414-290-6759

3 2

Re: [CentOS] Eth1 problem on CentOS-6.3
by James B. Byrne 15 Aug '12

15 Aug '12

On Wed, August 15, 2012 09:26, m.roth(a)5-cent.us wrote: > > My eyes uncrossed, and I saw, buried in there, the firstlink, above, > and the last. You might want to see if a) the 8168d firmware patch > will work on that card; b) vhost - it's a virtual host? perhaps it's > trying to load the firmware patch to the real NIC, and as a guest > VM, it doesn't have rights? > vhost is a kvm host system, not a virtualized guest. As I wrote elsewhere, I installed the kmod package from elrepo that handles this device, which solution I believe you may have originally suggested to me. In any case, that seems to have solved the problem (fingers crossed). Thanks for the help. I appreciate it very much. Sorry about your eyes. But when things are totally unfamiliar to me I hesitate to trim error logs lest out of ignorance I remove what is really important. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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Re: [CentOS] [SOLVED] (maybe) Eth1 problem on CentOS-6.3
by James B. Byrne 15 Aug '12

15 Aug '12

I seem to have resolved this issue by installing the alternate kernel module for this chip set available from elrepo. # /sbin/lspci -nn | grep -i net . . . 01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 03) . . . # /sbin/lspci -n | grep '01:00.0' 01:00.0 0200: 10ec:8168 (rev 03) Using the the device id (10ec:8168) to search: http://elrepo.org/tiki/DeviceIDs shows that this matches: r8168.ko pci 10EC:8168 kmod-r8168 # yum whatprovides kmod-r8168 . . . kmod-r8168-8.031.00-1.el6.elrepo.x86_64 : r8168 kernel module(s) Repo : elrepo Matched from: . . . # yum install kmod-r8168 . . . Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package kmod-r8168.x86_64 0:8.031.00-1.el6.elrepo will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: kmod-r8168 x86_64 8.031.00-1.el6.elrepo elrepo 73 k Transaction Summary ================================================================================ Install 1 Package(s) Total size: 73 k Installed size: 533 k Is this ok [y/N]: y Downloading Packages: . . . This seems to have cleared up the problem on both hosts but, only time will tell. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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