Discuss February 2015

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158 discussions

ntptrace ***Request timed out with stock C6 ntpd
by Patrick Bervoets 13 Feb '15

13 Feb '15

Following the recent ntp posts I decided to check my setup with ntptrace. localhost: stratum 3, offset -0.000020, synch distance 0.016330 81.95.117.62: timed out, nothing received ***Request timed out service ntpd status ntpd (pid 3018) is gestart... grep server /etc/ntp.conf | grep -v "#" server 0.centos.pool.ntp.org iburst server 1.centos.pool.ntp.org iburst server 2.centos.pool.ntp.org iburst server 3.centos.pool.ntp.org iburst ntpq> peer remote refid st t when poll reach delay offset jitter ============================================================================== +85.234.199.227 193.190.230.65 2 u 135 1024 377 29.759 -0.218 48.373 *79.132.231.103 193.190.230.66 2 u 328 1024 377 41.639 1.487 12.891 +195.200.224.66 193.67.79.202 2 u 958 1024 377 13.179 1.036 87.857 +81.95.117.62 193.67.79.202 2 u 343 1024 377 23.321 -1.759 24.933 I've tested on 3 C6 hosts and everyone gives a ***Request timed out. (everytime with an other host) Is there something wrong with my setup or with my testing? Thanks Patrick

2 1

test, and H/W
by m.roth＠5-cent.us 12 Feb '15

12 Feb '15

Hi, folks, This is a test post; to make it of interest, here's an issue you might want to be aware of, those with not brand new hardware. We've got a few Dell PE R415s. A 2TB b/u drive on one was getting full, so I went to replace it with a 3TB drive (a WD Red, not that it matters.) We got the system in '11. I built the drive - a GPT, 1 3TB partition, on an R320, from '12. smartctl understood it perfectly well. Anything else, not so much. parted *crashed* When I managed to force it to see it without crashing - I think I had to create a new GPT, it only saw 2199G. Put the drive back on the other box, parted complained that the "backup block" wasn't at the end of the disk. I finally talked to Dell, and was told, and I quote, <...> three terabyte drives aren't supported the raid controller installed in this server, the SAS 6 i/r. It likely worked fine in the R320 due to the age difference and the raid controller installed in it, I don't believe firmware updates will make the drive usable or extra space visible to the controller. <snip> IMPORTANT NOTE! Only the Dell H700 and H800 currently support the 3TB drives (H200 will add support later this year) - NO earlier controllers, such as the PERC4/5/6, SAS5/6 (or ANY other Dell controller not mentioned) have this support and in some cases, even though you may be able to see the drive, this has NOT been tested or validated, so possible data loss could be experienced. ONLY use the Dell H700 and H800 with the proper firmware to ensure a tested and validated >2TB solution! For non-Dell controllers, contact the controller vendor for their support statement on >2TB drives. mark

2 2

Cronjob and sudo
by Matt 12 Feb '15

12 Feb '15

I need to remove empty files out of a directory that are over 6 hours old so I created this script and put it in cron.hourly. #!/bin/sh cd /var/list sudo -u matt find /var/list -mmin +360 -empty -user matt -exec rm {} \; I want to run it as matt rather than root for just an added bit of safety. Problem is I get this. "sudo: sorry, you must have a tty to run sudo" Is there another way to do this? As I understand the reason for this is requiretty in sudo config. If that improves security I would rather not change that setting.

6 7

Packages not available in CentOS 7
by Venkateswara Rao Dokku 12 Feb '15

12 Feb '15

HI, I would like to upgrade my customized CentOS 5.5 to CentOS 7. For this I took the latest stable CentOS 7 image and wanted to install the packages that are there in the existing customized version of CentOS 5.5. I could install some of the packages, but the following packages I couldn't install. 1. Rhpl 2.mod_perl 3. 3.notification-daemon 4. 4.vixie-cron 5.kudzu 6.redhat-lsb 7.mod_python 8.webalizer 9.pam_ccreds 10.libnotify 11.irda_utils 112.readahead 113.MkInitrd 114.Alchemist 115.Cadevar 16.system-config-network-tui 17.firstboot-tui Whwhen tried to install the packages using *YUM *command, it is complaining that no such package. W When tried to install packages from rpm's, there are too many dependencies? CaCan you please suggest the best way to install the above packages in the latest CentOs? WhAre the packages deprecated? or merged into some other package? THThanks for the help -- Thanks & Regards, Venkateswara Rao Dokku.

5 5

info/EL5: subversion / mod_dav_svn
by Leon Fauster 12 Feb '15

12 Feb '15

Just to point out that EL5 does not get this patch: https://rhn.redhat.com/errata/RHSA-2015-0165.html "A NULL pointer dereference flaw was found in the way the mod_dav_svn module handled REPORT requests. A remote, unauthenticated attacker could use a specially crafted REPORT request to crash mod_dav_svn. (CVE-2014-3580)" https://bugzilla.redhat.com/show_bug.cgi?id=1174054#c17 -- LF

1 0

Why the command 'service ntpd stop' cause the time reversed?
by David chen 12 Feb '15

12 Feb '15

A shell script is deployed to synchronize time, the script is invoked hourly by crontab, and its content is as follows: #!/bin/bash service ntpd stop ntpdate 192.168.0.191 #it's a valid ntpd server in LAN service ntpd start chkconfig ntpd on Inspected the Linux log(Centos6.4 /var/log/messages), found the following fragment: Jan 7 14:00:01 host1 ntpd[32101]: ntpd exiting on signal 15 Jan 7 13:59:59 host1 ntpd[44764]: ntpd 4.2.4p8(a)1.1612-o Fri Feb 22 11:23:27 UTC 2013 (1) Jan 7 13:59:59 host1 ntpd[44765]: precision = 0.143 usec Jan 7 13:59:59 host1 ntpd[44765]: Listening on interface #0 wildcard, 0.0.0.0#123 Disabled Jan 7 13:59:59 host1 ntpd[44765]: Listening on interface #1 wildcard, ::#123 Disabled Jan 7 13:59:59 host1 ntpd[44765]: Listening on interface #2 lo, ::1#123 Enabled Jan 7 13:59:59 host1 ntpd[44765]: Listening on interface #3 em2, fe80::ca1f:66ff:fee1:eed#123 Enabled Jan 7 13:59:59 host1 ntpd[44765]: Listening on interface #4 lo, 127.0.0.1#123 Enabled Jan 7 13:59:59 host1 ntpd[44765]: Listening on interface #5 em2, 192.168.1.151#123 Enabled Jan 7 13:59:59 host1 ntpd[44765]: Listening on routing socket on fd #22 for interface updates Jan 7 13:59:59 host1 ntpd[44765]: kernel time sync status 2040 Jan 7 13:59:59 host1 ntpd[44765]: frequency initialized 499.399 PPM from /var/lib/ntp/drift Jan 7 14:00:01 host1 ntpd_initres[32103]: parent died before we finished, exiting Jan 7 14:04:17 host1 ntpd[44765]: synchronized to 192.168.0.191, stratum 2 Jan 7 14:04:17 host1 ntpd[44765]: kernel time sync status change 2001 The script should be executed at 14:00, the first line of the fragment also should indicate that the command 'service ntpd stop' have executed successfully, but why the second line timestamp(13:59:59) is less than the first line's(14:00:01)? Inspected the Linux log, the problem has happened three times, the time point was Jan 7 14:00:00, Jan 14 14:00:00 and Feb 4 14:00:00 respectively.

6 10

Do I need these?
by Mark LaPierre 12 Feb '15

12 Feb '15

Hey Y'all, I got a package update notice this evening for package augeas-libs. As is my practice I figured I would check to see if I needed the package or if I could just delete it thus obviating the need to install the upgrade. This is what yum has to say about the package and it's sole dependency. Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Removing: augeas-libs i686 1.0.0-7.el6 @base 934 k Removing for dependencies: netcf-libs i686 0.2.4-1.el6 @base 186 k Transaction Summary ================================================================================ Remove 2 Package(s) So just to be sure I put them both on the same command line and got this: Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Removing: augeas-libs i686 1.0.0-7.el6 @base 934 k netcf-libs i686 0.2.4-1.el6 @base 186 k Transaction Summary ================================================================================ Remove 2 Package(s) It would appear that there are no application packages that depend on augeas-libs or netcf-libs. It doesn't look like anything is using them. Is there any good reason why I should not just erase augeas-libs and netcf-libs? -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

2 2

[OT] Using rsync to backup / restore - when to use (or not use) the -H option switch?
by Francis Gerund 11 Feb '15

11 Feb '15

Hello. After some reading, including the rsync man page, I am still not clear on this: When using rsync to backup and restore, when should and when should one *not* include hard links (by using the -H option switch)? A simple example case would be backups for one or just a few light-duty local workstations. Is there a simple, clear rule about that, or is it too complicated for that?

5 6

VMWare server 2 disk image and QEMU
by Allart Pieters 11 Feb '15

11 Feb '15

I need to convert a VMWare Server 2 disk image to QEMU. I've read that QEMU supports VMWare disk formats. I just want to be sure it also supports the old VMWare Server 2 format. Anyone has any experience with/knowledge about this? Tnx in advance, Allart

3 2

SCL MirrorList error
by Andrew Lau 11 Feb '15

11 Feb '15

Hi, In the past my mirrorlist for SCL, http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=SCL has worked without any issues. Recently http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=SCL redirects to http://mirror.centos.org/centos/6/scl/x86_64/ which leads to 404, instead it should be http://mirror.centos.org/centos/6/SCL/x86_64/ Is this a change or bug. Thanks, Andrew

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Discuss February 2015