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I have a Linux gentoo system, which performs a cronjob every day at 3:10 in the morning. However, no file in /etc contains any related information to this particular cronjob, and the result of crontab -l is

# check scripts in cron.hourly, cron.daily, cron.weekly and cron.monthly
MAILTO=""
0  *  * * * rm -f /var/spool/cron/lastrun/cron.hourly
1  3  * * * rm -f /var/spool/cron/lastrun/cron.daily
15 4  * * 6 rm -f /var/spool/cron/lastrun/cron.weekly
30 5  1 * * rm -f /var/spool/cron/lastrun/cron.monthly
*/10 * * * * test -x /usr/sbin/run-crons && /usr/sbin/run-crons

The directory /etc/cron.daily probably contains the job in question, but for a time at 3:01! Why is that? Is the actual cronjobn stored somewhere else? Does it take gentoo 9 minutes to realize to execute a job?

Additional information:

  • I have a different crontab job for 13:20 (in cron.d) which is executed exactly at 13:20 every day.
  • no idea about gentoo, but maybe the job is run under another user context? Look into /var/spool/cron/ , maybe you find something there. – natxo asenjo Jun 13 '14 at 7:53
  • Did not find something different there; I am looged in to the system as root. – Alex Jun 13 '14 at 7:57
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Check if it's not from another user:

getent passwd | while read r; do sudo -u $(echo $r | cut -d':' -f1) crontab -l; done
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  • No there isn't another user which has a cronjob at 3:10. If crontabs are defined, they are identical to the one I posted above. – Alex Jun 13 '14 at 11:09
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crontab -l only lists the per-user crontab of the calling user. There is also a system crontab, which can only be edited by root but can run jobs as any users. The system crontab is in the file /etc/crontab, with additional jobs in files in the directory /etc/cron.d.

The directories /etc/cron.daily, /etc/cron.weekly and /etc/cron.monthly are not built into by cron, but traversed by a job listed in /etc/crontab.

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