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+.\" $Id: atrun.man,v 1.1 1994/05/10 18:23:08 kernel Exp $
+.Dd April 12, 1995
+.Dt ATRUN 8
+.Os "FreeBSD 2.1"
+.Sh NAME
+.Nm atrun
+.Nd run jobs queued for later execution
+.Sh SYNOPSIS
+.Nm atrun
+.Op Fl l Ar load_avg
+.Op Fl d
+.Sh DESCRIPTION
+.Nm Atrun
+runs jobs queued by
+.Xr at 1 .
+Root's
+.Xr crontab 5
+file
+.Pa /etc/crontab
+has to contain the line
+.nf
+*/5     *       *       *       *       root    _ATLIB_DIR/atrun
+.fi
+so
+.Xr atrun 8
+gets called every five minutes.
+.Pp
+At every invocation, every job in lowercase queues whose starting time
+has passed is started.
+A maximum of one batch jobs (denoted by uppercase queues) are started
+each time
+.Nm atrun
+is invoked.
+.Sh OPTIONS
+.Bl -tag -width indent
+.It Fl l Ar load_avg
+Specifies a limiting load factor, over which batch jobs should
+not be run, instead of the compiled \- in value of _LOADAVG_MX.
+.It Fl d
+Debug; print error messages to standard error instead of using
+.Xr syslog 3 .
+.El
+.Sh WARNINGS
+For
+.Nm atrun
+to work, you have to start up a
+.Xr cron 8
+daemon.
+.Sh FILES
+.Bl -tag -width _ATSPOOL_DIR -compact
+.It Pa _ATSPOOL_DIR
+Directory containing output spool files
+.It Pa _ATJOB_DIR
+Directory containing job files
+.El
+.Sh SEE ALSO
+.Xr cron 8 ,
+.Xr crontab 1 ,
+.Xr crontab 5 ,
+.Xr at 1 ,
+.Xr syslog 3 .
+.Sh BUGS
+The functionality of 
+.Nm atrun
+should be merged into
+.Xr cron 8 .