Difference between revisions of "Crontab"

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  <minute> <hour> <day of month> <month> <day of week> [user] <command>
 
  <minute> <hour> <day of month> <month> <day of week> [user] <command>
 
where [user] is optional.
 
where [user] is optional.
 +
 +
= Examples =
 +
Run the command fetchmail every day at 10 minutes past 1:
 +
10 1 * * * fetchmail
 +
Run the command fetchmail every day and hour at 10 minutes past the hour:
 +
10 * * * * fetchmail
 +
Run the command fetchmail every 10 minutes:
 +
*/10 * * * * fetchmail
  
 
= See also =
 
= See also =
* [http://man-wiki.net/index.php/5:crontab crontab's man page]
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* [http://www.manpagez.com/man/5/crontab/ crontab's man page]

Latest revision as of 08:44, 24 April 2014

crontab is a configuration file in the /etc folder that tells the cron daemon when to perform what commands. It can look like this:

# Sample crontab file

*/10 * * * * fetchmail -p pop3 -u 612696 -v pop.gmx.net

A line starting with a # is a comment. The other line in this example follows the form

<minute> <hour> <day of month> <month> <day of week> [user] <command>

where [user] is optional.

Examples

Run the command fetchmail every day at 10 minutes past 1:

10 1 * * * fetchmail

Run the command fetchmail every day and hour at 10 minutes past the hour:

10 * * * * fetchmail

Run the command fetchmail every 10 minutes:

*/10 * * * * fetchmail

See also