.TH AT 1.SH NAMEat, atrun \- execute commands at a later time.SH SYNOPSIS\fBat \fItime\fR [\fImonth day\fR] [\fIfile\fR]\fR.br.de FL.TP\\fB\\$1\\fR\\$2...de EX.TP 20\\fB\\$1\\fR# \\$2...SH EXAMPLES.EX "at 2315 Jan 31 myfile" "Myfile executed Jan 31 at 11:15 pm".EX "at 0900" "Job input read from \fIstdin\fR".EX "at 0711 4 29 " "Read from \fIstdin\fR, exec on April 29".SH DESCRIPTION.PP\fIAt\fR prepares a file to be executed later at the specified time by creating a special entry in \fI/usr/spool/at\fR.  The program \fIatrun\fR should be started periodically, for example, every minute by \fIcron\fR.  \fIAtrun\fR checks to see if anyfiles in \fI/usr/spool/at\fR should now be run, and if so, it runs them and then puts them in \fI/usr/spool/at/past\fR.The name of the file created in \fI/usr/spool/at\fR by \fIat\fR is YY.DDD.HHMM.UU (where YY, DDD, HH, and MM give the time to execute and UU is a unique number).  Note that when the command runs, it will not be able to use \fIstdin\fR or \fIstdout\fR unless specifically redirected.  In the first example above, it might be necessary to put \fI>/dev/log\fRon some lines in the shell script \fImyfile\fR.  The same holds for the commands typed directly to \fIat\fR..SH "SEE ALSO".BR cron (8).