.TH CRON 8.SH NAMEcron \- clock daemon.SH SYNOPSIS\fBcron\fR.br.de FL.TP\\fB\\$1\\fR\\$2...de EX.TP 20\\fB\\$1\\fR# \\$2...SH EXAMPLES.EX "/usr/bin/cron" "Use absolute path in \fI/etc/rc\fR".SH DESCRIPTION.PP\fICron\fR is clock daemon.  It is typically started up by including thecommand \fI/usr/bin/cron\fR in the \fI/etc/rc\fR file.  Once started, \fIcron\fR puts itselfin the background, so no & is needed.  It runs forever, sleeping most ofthe time.  Once a minute it wakes up and examines \fI/usr/lib/crontab\fR to seeif there is any work to do.  If there is, the work is done.  The entries of\fI/usr/lib/crontab\fR contain 6 elements each.  Some examples follow:.PP.nf.ta 0.10i 0.40i 0.70i 1.0i 1.3i 1.8i 4.0i\fB	Min	Hr	Dat	Mo	Day	Command\fR	\0*	\0*	\0*	\0*	\0*	/usr/bin/date >/dev/log   #print date every minute	\00	\0*	\0*	\0*	\0*	/usr/bin/date >/dev/log   #print date on the hour	30	\04	\0*	\0*	1-5	/bin/backup /dev/fd1      #do backup Mon-Fri at 0430	30	19	\0*	\0*	1,3,5	/etc/backup /dev/fd1      #Mon, Wed, Fri at 1930	\00	\09	25	12	\0*	/usr/bin/sing >/dev/log   #Xmas morning at 0900 only.fi.SH "SEE ALSO".BR at (1).