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RedHat 9 (Linux i386) - man page for cron (redhat section 8)

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CRON(8) 										  CRON(8)

       cron - daemon to execute scheduled commands (Vixie Cron)


       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/spool/cron  for  crontab  files  which  are  named  after  accounts  in
       /etc/passwd;  crontabs  found are loaded into memory.  Cron also searches for /etc/crontab
       and the files in the  /etc/cron.d/  directory,  which  are  in  a  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  executing	commands,
       any output is mailed to the owner of the crontab (or to the user named in the MAILTO envi-
       ronment variable in the crontab, if such exists).

       Additionally, cron checks each minute to see if its spool directory's modtime (or the mod-
       time  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  when-
       ever  a crontab file is modified.  Note that the Crontab(1) command updates the modtime of
       the spool directory whenever it changes a crontab.

       crontab(1), crontab(5)

       Paul Vixie <paul@vix.com>

4th Berkeley Distribution		 20 December 1993				  CRON(8)
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