Crontab

  • edit per-user with crontab -e
* * * * * command
  1. min (0 - 59)
  2. hour (0 - 23)
  3. day of month (1 - 31)
  4. month (1 - 12)
  5. day of week (0 - 6) (Sunday=0)
  • Values can be seperated by commas: eg. 0,20,40
  • Values can be divided: eg. */3 (3 times an hour)

Note: The output will be mailed to you, except you do >/dev/null 2>&1

More info: http://www.google.com/search?q=crontab