cron(1M)                                                 cron(1M)



     NAME
          cron - clock daemon

     SYNOPSIS
          /etc/cron

     DESCRIPTION
          cron executes commands at specified dates and times.  You
          can schedule commands regularly with instructions in crontab
          files; other users can submit their own crontab file with
          the crontab command.  Use the at command for commands which
          execute only once.  Since cron never exits, you should
          should only execute it once.  This is best done by running
          cron from the initialization process, using the file /etc/rc
          (see init(1M)).

          cron examines crontab files and at command files only during
          process initialization and when a file is updated using
          crontab(1).  This reduces the overhead of checking for new
          or changed files at regularly scheduled intervals.

     EXAMPLE
          If the shell file /etc/rc contains the command line

               /etc/cron

          the clock daemon will start every time /etc/rc is invoked,
          i.e., each time the system goes into multi-user mode after
          booting.

     FILES
          /etc/cron
          /usr/lib/cron        main cron directory
          /usr/lib/cron/log    accounting information
          /usr/spool/cron      spool area

     SEE ALSO
          at(1), crontab(1), sh(1), init(1M).

     DIAGNOSTICS
          A history of cron actions are recorded in /usr/lib/cron/log.














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