at(1) [minix man page]

AT(1)							      General Commands Manual							     AT(1)

NAME

       at, atrun - execute commands at a later time

SYNOPSIS

       at time [month day] [file]

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

DESCRIPTION

       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.

SEE ALSO

       cron(8).

																	     AT(1)

ATRUN(8)						    BSD System Manager's Manual 						  ATRUN(8)

NAME

     atrun -- run jobs queued for later execution

SYNOPSIS

     atrun [-l load_avg] [-d]

DESCRIPTION

     Atrun runs jobs queued by at(1).

     Root's crontab(5) file /etc/crontab has to contain the line

     */5     *	     *	     *	     *	     root    /usr/libexec/atrun

     so that atrun gets invoked every five minutes.

     At every invocation, atrun will start all the jobs in the lowercase queues whose start time has elapsed.  In addition, if the load average
     over the last minute was less than the specified limit then a maximum of one batch job (denoted by the uppercase queues) is started.

     Before starting a job, atrun will check the status of its owner's account with pam(3) and refuse to run the job if the account is unavail-
     able, e.g., locked out or expired.

OPTIONS

     -l load_avg
	     Specify a limiting load factor, over which batch jobs should not be run, instead of the default of 1.5 * number of active CPUs.

     -d      Debug; print error messages to standard error instead of using syslog(3).

WARNINGS

     For atrun to work, you have to start up a cron(8) daemon.

FILES

     /etc/pam.d/atrun  pam.conf(5) configuration file for atrun
     /var/at/jobs      Directory containing job files
     /var/at/spool     Directory containing output spool files

SEE ALSO

     at(1), crontab(1), pam(3), syslog(3), crontab(5), pam.conf(5), cron(8)

BUGS

     The functionality of atrun should be merged into cron(8).

BSD
								 October 30, 2012							       BSD