cron -- Execute commands periodically

/etc/cron&

cron is invoked only once, usually from /etc/rc.  Thereafter, it sleeps in the
background, awaking periodically to check crontab files -- either the file
/usr/lib/crontab if it exists, or the files in directory
/usr/spool/cron/crontabs if /usr/lib/crontab does not exist.

Entries in a crontab file consist of commands preceded by five fields; these
represent minute (0-59), hour (0-23), day of the month (1-31), month (1-12),
and day of the week (1-7).  An asterisk `*' in a field means all possible
entries for that field.
					

© 2012 by Stephen A. Ness