


      CRON(1)                     (UNIX 5.2)                    CRON(1)



      NAME
           cron - clock daemon

      SYNTAX
           /etc/cron

      DESCRIPTION
           Cron executes commands at specified dates and times.
           Regularly scheduled commands can be specified according to
           instructions found in crontab files; users can submit their
           own crontab file via the crontab command.  Commands which
           are to be executed only once may be submitted via the at
           command.  Since cron never exits, it should only be executed
           once.  This is best done by running cron from the
           initialization process through the file /etc/rc.

           Cron only examines crontab files and at command files during
           process initialization and when a file changes.  This
           reduces the overhead of checking for new or changed files at
           regularly scheduled intervals.

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

      SEE ALSO
           at(1), crontab(1), rc(5), sh(1)

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























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