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minute  hour  monthday  month  weekday  command

           minute         The minute of the hour, 0-59

           hour           The hour of the day, 0-23

           monthday       The day of the month, 1-31

           month          The month of the year, 1-12

           weekday        The day of the week, 0-6, 0=Sunday

# crontab -l
0 2 * * * /myjob > /dev/null
0 1 * * * /mydir/myscript.sh > /mydir/my.out 2> /opt/inetrr/script/my.err