====== Crontab ======
  * edit per-user with crontab -e 
<code>* * * * * command</code>
  - **min** //(0 - 59)//
  - **hour** //(0 - 23)//
  - **day of month** //(1 - 31)//
  - **month** //(1 - 12)//
  - **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]]