CRON(8)                                                   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.  As an enhancement, BSD/386 Cron also
       searches for /etc/crontab which is in a slightly different
       format (see crontab(5)).  Cron then wakes up every minute,
       examining all stored crontabs, checking  each  command  to
       see  if it should be run in the current minute.  When exe-
       cuting 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 mod-
       ified.   Note that the Crontab(1) command updates the mod-
       time of the spool directory whenever it changes a crontab.

SEE ALSO
       crontab(1), crontab(5)

AUTHOR
       Paul Vixie, paul@vixie.sf.ca.us






















                           15 Nov 1988                          1