add directory Minix

Minix/1.7.5/MANUALS/CAT0/AT

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+Command:   at, atrun - execute commands at a later time
+Syntax:    at time [month day] [file]
+Flags:     (none)
+Examples:  at 2315 Jan 31 myfile    # Myfile executed Jan 31 at 11:15 pm
+           at 0900                  # Job input read from stdin
+           at 0711 4 29             # Read from stdin, exec on April 29
+
+     At prepares a file to be executed later at the  specified  time  by
+creating  a  special entry in /usr/spool/at. The program atrun should be
+started periodically, for example, every minute by cron.   Atrun  checks
+to  see  if  any files in /usr/spool/at should now be run, and if so, it
+runs them and then puts them in /usr/spool/at/past.   The  name  of  the
+file  created  in  /usr/spool/at by at 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 stdin or stdout
+unless specifically redirected.  In the first example above, it might be
+necessary to put >/dev/log on some lines in the shell script myfile. The
+same holds for the commands typed directly to at.
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+                                                                        
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