cron(1M)                                                 cron(1M)



NAME
     cron - runs the clock daemon

SYNOPSIS
     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 at for commands which execute only
     once.  Since cron never exits, you should only execute it
     once.  The cron command is listed in the /etc/inittab file
     and is therefore started directly by init(1M).

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

STATUS MESSAGES AND VALUES
     A history of cron actions is recorded in /usr/lib/cron/log.

FILES
     /etc/cron
          Executable file
     /usr/lib/cron
          Main cron directory
     /usr/lib/cron/log
          File containing accounting information
     /usr/spool/cron
          Spool area file
     /usr/lib/cron/queuedefs
          File containing scheduling information

SEE ALSO
     init(1M)

     at(1), crontab(1), sh(1) in A/UX Command Reference















January 1992                                                    1