A default crontab header that will make the life easier for those who don't remember cron fields or keywords.

crontab_header.sh

##   CRONTAB HINTS AND TIPS
##   
##   
##   Entry              Description     Equivalent To
##   @yearly (or @annually)     Run once a year at midnight in the morning of January 1         0 0 1 1 *
##   @monthly   Run once a month at midnight in the morning of the first of the month   0 0 1 * *
##   @weekly    Run once a week at midnight in the morning of Sunday    0 0 * * 0
##   @daily             Run once a day at midnight      0 0 * * *
##   @hourly    Run once an hour at the beginning of the hour   0 * * * *
##   @reboot    Run at startup  @reboot
##   
##   *    *    *    *    *  command to be executed
##   ┬    ┬    ┬    ┬    ┬
##   │    │    │    │    │
##   │    │    │    │    │
##   │    │    │    │    └───── day of week (0 - 7) (0 or 7 are Sunday, or use names)
##   │    │    │    └────────── month (1 - 12)
##   │    │    └─────────────── day of month (1 - 31)
##   │    └──────────────────── hour (0 - 23)
##   └───────────────────────── min (0 - 59)
##   
##   
##   
##   The following example will run each 10 minutes
##   */10 * * * * /usr/bin/somedirectory/somecommand

##   Disable E-mail notifications
MAILTO=""

##   Set where to look for executable files
PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/sbin:/usr/local/bin:$PATH

## Ok, we are ready to go. Put your schedules below :-)

this has come in handy so many times!