[mrtg] MRTG not running by default after reboot

Steve Shipway s.shipway at auckland.ac.nz
Thu May 16 00:13:32 CEST 2013

Does that time syntax work in your version of cron?  For some, you’d need
to use


*/5 * * * * root [ -x /usr/bin/mrtg -a -r /etc/mrtg.cfg ] && env LANG=C
/usr/bin/mrtg /etc/mrtg.cfg >> /var/log/mrtg/mrtg.log 2>&1


Or even…


0,5,10,15,20,25,30,35,40,45,50,55 * * * * root …..


Also check permissions etc on the file in cron.d to make sure it is actually
being processed.  Try putting the definition (without the ‘root’ bit)
directly in the root crontabs instead.





Steve Shipway

ITS Unix Services Design Lead

University of Auckland, New Zealand

Floor 1, 58 Symonds Street, Auckland

Phone: +64 (0)9 3737599 ext 86487

DDI: +64 (0)9 923 6487

Mobile: +64 (0)21 753 189

Email:  <mailto:s.shipway at auckland.ac.nz> s.shipway at auckland.ac.nz

P Please consider the environment before printing this e-mail : 打印本邮件,


From: mrtg-bounces+s.shipway=auckland.ac.nz at lists.oetiker.ch
[mailto:mrtg-bounces+s.shipway=auckland.ac.nz at lists.oetiker.ch] On Behalf Of
Joel Roberts
Sent: Thursday, 16 May 2013 8:53 a.m.
To: mrtg at lists.oetiker.ch
Subject: [mrtg] MRTG not running by default after reboot


Just did a new install of mrtg, been a while since I’d done one so jumped
through some hoops to get the index pages just the way I wanted them, but
now when rebooting the server (Debian Linux 6), mrtg doesn’t run on its
own, I have to execute:


env LANG=C /usr/bin/mrtg /etc/mrtg.cfg


from the terminal to get it to start graphing again. I checked in /etc/cron.
d, the mrtg file is there with the following entry:


0-55/5 * * * * root if [ -x /usr/bin/mrtg ] && [ -r /etc/mrtg.cfg ]; then
env LANG=C /usr/bin/mrtg /etc/mrtg.cfg >> /var/log/mrtg/mrtg.log 2>&1; fi


The log file listed in the cron job hasn’t been updated in 2 days either,
even after manually starting mrtg. Any help in getting it to run
automatically would be greatly appreciated.


Thanks in advance,




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