CRON(1M)             INTERACTIVE UNIX System             CRON(1M)



          NAME
               cron - clock daemon

          SYNOPSIS
               /etc/cron

          DESCRIPTION
               The cron command executes commands at specified dates and
               times.  Regularly scheduled commands can be specified
               according to instructions found in crontab files in the
               directory /usr/spool/cron/crontabs.  Users can submit their
               own crontab file via the crontab(1) command.  Commands which
               are to be executed only once may be submitted via the at(1)
               command.

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

               Since cron never exits, it should be executed only once.
               This is done routinely through /etc/rc2.d/S75cron at system
               boot time.  /usr/lib/cron/FIFO is used as a lock file to
               prevent the execution of more than one cron.

          FILES
               /usr/lib/cron         main cron directory
               /usr/lib/cron/FIFO    used as a lock file
               /usr/lib/cron/log     accounting information
               /usr/spool/cron       spool area
               /usr/default/cron

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

          DIAGNOSTICS
               To keep a log of all actions taken by cron , set CRONLOG=YES
               in the file /etc/default/cron.  No logging is done if you
               set CRONLOG=NO (default setting).  Keeping a log is a user-
               configurable option.  cron usually creates very large log
               files.














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