Jan Walraven
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  • Posted on February 23, 2012

    A crontab file has five fields for specifying day , date and time followed by the command to be run at that interval.

    
    *     *     *   *    *        command to be executed
    -     -     -   -    -
    |     |     |   |    |
    |     |     |   |    +----- day of week (0 - 6) (Sunday=0)
    |     |     |   +------- month (1 - 12)
    |     |     +--------- day of        month (1 - 31)
    |     +----------- hour (0 - 23)
    +------------- min (0 - 59)