Tag Archives: crontab

When does cron.daily etc run?

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I wanted to know what time of day my cron.daily, cron.weekly, etc. cron jobs where scheduled to run. The answer is in /etc/crontab:

# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.

SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

# m h dom mon dow user  command
17 *    * * *   root    cd / && run-parts --report /etc/cron.hourly
25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6    * * 7   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6    1 * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
#

How To Set Cron to Run Every 5 Minutes

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Thanks to this handy document How To Set Cron to Run Every 5 Minutes I now my crontab configured so that my jj5-test repo gets updated every five minutes. It’s the sort of thing I generally do in a post-commit hook, but in this case that won’t work owing to the way the servers are configured (the files are in my account and not owned by the www-data user the commit-hook runs as).

So to configure cron I issued the command:

 $ crontab -e

And then to update my svn working copy:

# m h  dom mon dow   command
*/5 * * * * cd /home/jj5/web/test && svn update > /dev/null

crontab

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I’m setting up some backup scripts and am using cron to schedule them to run. Usually I run my backup scripts as root and just link a file into /etc/cron.*/ for periodic processing. However in this case I need to run the backup scripts as my user (they’re offsite backup scripts that use rsync to copy data) and not root, so I used crontab -e to edit my crontab. I did a little reading on crontab and learned about the @weekly syntax which I’ve used for the first time today. Now I guess I just wait a week and see that everything is working. :)