cron.8

<B>Digital的Unix操作系统VAX 4.2源码</B>

.\" SCCSID: @(#)cron.8	8.1	9/11/90
.TH cron 8 
.SH Name
cron \- clock daemon
.SH Syntax
.B /etc/cron
.SH Description
.NXR "cron command"
.NXR "crontab file" 
.NXR "clock daemon"
The
.PN cron
command executes commands at specified dates and times
according to the instructions in the file
.PN /usr/lib/crontab .
Since
.PN cron
never exits,
it should only be executed once.
This is best done by running
.PN cron
from the initialization
process through the file
.PN /etc/rc .
.PP
The
.PN crontab
file is examined by
.PN cron
every minute.
.SH Files
.PN /usr/lib/crontab
.SH See Also
crontab(5), init(8)
.br
.I "Guide to System Environment Setup"