# 2.11BSD#431 - /usr/man/cat8/cron.0

    CRON(8)             UNIX Programmer's Manual              CRON(8)

    NAME
         cron - daemon to execute scheduled commands (Vixie Cron)

    SYNOPSIS
         cron

    DESCRIPTION
         Cron should be started from /etc/rc or /etc/rc.local.  It
         will return immediately, so you don't need to start it with
         '&'.

         Cron searches /var/cron/tabs for crontab files which are
         named after accounts in /etc/passwd; crontabs found are
         loaded into memory.  Cron also searches for /etc/crontab
         which is in a different format (see crontab(5)).  Cron then
         wakes up every minute, examining all stored crontabs, check-
         ing each command to see if it should be run in the current
         minute.  When executing commands, any output is mailed to
         the owner of the crontab (or to the user named in the MAILTO
         environment variable in the crontab, if such exists).

         Additionally, cron checks each minute to see if its spool
         directory's modtime (or the modtime on /etc/crontab) has
         changed, and if it has, cron will then examine the modtime
         on all crontabs and reload those which have changed.  Thus
         cron need not be restarted whenever a crontab file is modi-
         fied.  Note that the Crontab(1) command updates the modtime
         of the spool directory whenever it changes a crontab.

    SEE ALSO
         crontab(1), crontab(5)

    AUTHOR
         Paul Vixie <paul@vix.com>

    Printed 11/26/99        20 December 1993                        1

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