Discuss August 2012

discuss@lists.centos.org

190 participants
167 discussions

Deduplication data for CentOS?
by Rainer Traut 01 Oct '12

01 Oct '12

Hi list, is there any working solution for deduplication of data for centos? We are trying to find a solution for our backup server which runs a bash script invoking xdelta(3). But having this functionality in fs is much more friendly... We have looked into lessfs, sdfs and ddar. Are these filesystems ready to use (on centos)? ddar is sthg different, I know. Thx Rainer

14 28

Constant ACPI Errors every 5min in dmesg & messages.log
by Svavar Örn Eysteinsson 16 Sep '12

16 Sep '12

Hi. I get these ACPI errors constantly every 5min or so in /var/log/messages and dmesg : kernel: ACPI Error: SMBus or IPMI write requires Buffer of length 42, found length 20 (20090903/exfield-286) kernel: ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PMI0._PMM] (Node ffff88061056cb00), AE_AML_BUFFER_LIMIT kernel: ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20090903/power_meter-341) It's brand new HP DL380 G7 server with CentOS 6.2 with all updates. Anyone know about these ACPI errors ? Best regards, Svavar O Reykjavik - Iceland

2 1

Is glusterfs ready?
by John Doe 12 Sep '12

12 Sep '12

Hey, since RH took control of glusterfs, I've been looking to convert our old independent RAID storage servers to several non RAID glustered ones. The thing is that I, here and there, heard a few frightening stories from some users (even with latest release). Any one has experienced with it long enough to think one can blindly trust it or if it is almost there but not yet ready? Thx, JD

10 19

Can,t get pam_mkhomedir to work...
by Nicolas Ross 08 Sep '12

08 Sep '12

On a ldap enabled CentOS 6.3 x64 system, I try to make it so home directories are auto-created. I added this : session required pam_mkhomedir.so skel=/etc/skel/ umask=0077 to my /etc/pam.d/system-auth And it does nothing. I restarted messagebus (I've seen references to that) and sshd, and logs don't mention anything in regards to pam_mkhomedir... Any hints ?

3 4

C6: ntpd time reset +277092510.162464 s
by Rainer Traut 03 Sep '12

03 Sep '12

Hi, I'm in the middle of migrating our oracle servers to RHEL and C6; while testing ntpd I'm seeing time resets. I see in sysconfig/ntpd the option g is set which means huge offset is one time ignored. But my understanding of ntpd is, it slows or accelerated kernel clock but does not make huge jumps... Is this really expected behaviour? The file step-tickers is empty, ntp.conf is minimal: driftfile /var/lib/ntp/drift restrict default kod nomodify notrap nopeer noquery restrict -6 default kod nomodify notrap nopeer noquery restrict 127.0.0.1 restrict -6 ::1 server 10.0.1.27 /var/log/messages: Nov 20 12:48:06 aitcsdb002 ntpd[5816]: ntpd 4.2.4p8(a)1.1612-o Thu May 13 14:38:25 UTC 2010 (1) Nov 20 12:48:06 aitcsdb002 ntpd[5817]: precision = 0.065 usec Nov 20 12:48:06 aitcsdb002 ntpd[5817]: Listening on interface #0 wildcard, 0.0.0.0#123 Disabled Nov 20 12:48:06 aitcsdb002 ntpd[5817]: Listening on interface #1 wildcard, ::#123 Disabled Nov 20 12:48:06 aitcsdb002 ntpd[5817]: Listening on interface #2 lo, ::1#123 Enabled Nov 20 12:48:06 aitcsdb002 ntpd[5817]: Listening on interface #3 eth1, fe80::20c:29ff:fef1:3fee#123 Enabled Nov 20 12:48:06 aitcsdb002 ntpd[5817]: Listening on interface #4 eth0, fe80::20c:29ff:fef1:3fe4#123 Enabled Nov 20 12:48:06 aitcsdb002 ntpd[5817]: Listening on interface #5 lo, 127.0.0.1#123 Enabled Nov 20 12:48:06 aitcsdb002 ntpd[5817]: Listening on interface #6 eth0, 10.0.4.16#123 Enabled Nov 20 12:48:06 aitcsdb002 ntpd[5817]: Listening on interface #7 eth1, 10.0.5.16#123 Enabled Nov 20 12:48:06 aitcsdb002 ntpd[5817]: Listening on routing socket on fd #24 for interface updates Nov 20 12:48:06 aitcsdb002 ntpd[5817]: kernel time sync status 2040 Aug 31 16:00:51 aitcsdb002 ntpd[5817]: synchronized to 10.0.1.27, stratum 3 Aug 31 16:00:51 aitcsdb002 ntpd[5817]: time reset +277092510.162464 s Thx

3 6

OpenMPI I/O not working
by Cihan Altinay 02 Sep '12

02 Sep '12

Hi list, It appears there is a problem with the OpenMPI I/O library on CentOS 6.2 & 6.3 (package openmpi-1.5.4-1.el6.x86_64). When I compile the attached program it ends up in the error path since MPI_File_open returns 16. The corresponding (unhelpful) message is: MPI_ERR_OTHER: known error not in list I couldn't find any pointers on the net and the same program works with OpenMPI 1.4.5 on a debian system. Any help would be greatly appreciated. Cheers, Cihan

2 4

Spamassassin under CentOS-6.3
by Timothy Murphy 31 Aug '12

31 Aug '12

Spamassassin seems to have become more-or-less non-functional in use with KMail on my server. It appears to be running OK, but only catches about 20% of my spam. I wonder if others have experienced this decline? I suspect that sa-learn is not performing properly. (I run sa-learn nightly on my spam, which is saved in ~/Maildir/.Spam/cur/ , through the default spamassassin installation.) Eg I receive more or less identical spam many times without it being caught. Also, about 35% of the spam that gets through is in foreign languates - Russian, Chinese, Arabic and Turkish - and it would help if I could get rid of this. I read up about catching such email in spamassassin, but did not understand exactly what changes are required. One difficultly I have is that there seem many places where one can make changes in spamassassin settings. Am I right in thinking that all such changes can be made in .spamassassin/user_prefs ? What should I put in this file to change the score for eg 3.5 BAYES_99 BODY: Bayes spam probability is 99 to 100% Any advice or suggestions gratefully received. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College Dublin

3 2

Re: [CentOS] Good Anti-virus for Linux desktops and servers
by J.Witvliet＠mindef.nl 31 Aug '12

31 Aug '12

-----Original Message----- 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 -----Original Message----- Just a final remark, Most AV-scanners are not capable of detecting everything. If you really want to protect Microsoft desktops behind your Linux machine, you need multiple scanners serialized. What's been said before, Kaspersky is really good specially compared with clamav. Last time I tried clamav with a population of captured viri, it only detected 60% of them. BUT: ... it did detect the ones that Kasperky didn't. So the combination of multiple different detectors (not specifically these two) is advisable. Hw ______________________________________________________________________ Dit bericht kan informatie bevatten die niet voor u is bestemd. Indien u niet de geadresseerde bent of dit bericht abusievelijk aan u is toegezonden, wordt u verzocht dat aan de afzender te melden en het bericht te verwijderen. De Staat aanvaardt geen aansprakelijkheid voor schade, van welke aard ook, die verband houdt met risico's verbonden aan het elektronisch verzenden van berichten. This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. The State accepts no liability for damage of any kind resulting from the risks inherent in the electronic transmission of messages.

2 1

NTOP alternatives?
by Rafał Radecki 31 Aug '12

31 Aug '12

Hi all. I have currently a task to implement a network traffic analyzer. Some years ago I've used NTOP for that purpose, I would also like to test some alternatives. Which alternatives can you recommend and why? Thanks ;) Best regards, Rafał Radecki.

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OT: Tool for monitoring traffic IP reception
by C. L. Martinez 31 Aug '12

31 Aug '12

Hi all, I am searching some lightweight tool to control when rsyslog didn't receive events from a specific host or group of hosts for x minutes/seconds. Only a simple tool to send an email when an alert is triggered, I don't need flat tools like zabbix or similars. Does anyone know any?

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Discuss August 2012