Crontab header ou cabeçalho

copied from http://www.velvetcache.org/2008/01/10/easy-crontab-header

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# +--------- Minute (0-59) | Output Dumper: >/dev/null 2>&1 # | +------- Hour (0-23) | Multiple Values Use Commas: 3,12,47 # | | +----- Day Of Month (1-31) | Do every X intervals: */X -> Example: */15 * * * * Is every 15 minutes # | | | +--- Month (1 -12) | Aliases: @reboot -> Run once at startup; @hourly -> 0 * * * *; # | | | | +- Day Of Week (0-6) (Sunday = 0) | @daily -> 0 0 * * *; @weekly -> 0 0 * * 0; @monthly ->0 0 1 * *; # | | | | | | @yearly -> 0 0 1 1 *; # * * * * * COMMAND |