https://halfgeek.org/wiki/index.php?action=history&feed=atom&title=CronCron - Revision history2026-05-28T12:32:07ZRevision history for this page on the wikiMediaWiki 1.34.0https://halfgeek.org/wiki/index.php?title=Cron&diff=172&oldid=prev129.6.84.38 at 14:39, 26 May 20052005-05-26T14:39:18Z<p></p>
<p><b>New page</b></p><div>Setting up cron is simple. Embarrassingly simple. The embarrassing part is Googling a site with an example every single time one has to use it. Here is that information.<br />
<br />
=Setting up a crontab=<br />
<br />
Run<br />
<br />
crontab -e<br />
<br />
This will open up everyone's favorite editor (set <code>EDITOR=vim</code> if someone made a mistake ;-)) to edit the crontab file (actually, a temp file&mdash;the file is parsed for correctness as soon as you close it, and only committed if there were no errors).<br />
<br />
The format is a quintuple of time coordinates, trailed by the command to be executed.<br />
<br />
#Minute Hour M.day Month Weekday Command<br />
# 0-59 0-23 1-31 1-12 0-6<br />
# 0=Sun<br />
<br />
Any given time coordinate can be entered as a single number, a comma-delimited list, hyphen-defined range or a <code>*</code> indicating all.<br />
<br />
# 10:35am on every Monday, Tuesday, and Wednesday in February or August<br />
35 10 * 2,8 1-3 /usr/bin/updatedb >/dev/null 2>&1<br />
<br />
That's about all there is to it.</div>129.6.84.38