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atrun – run jobs queued for later execution
USAGE
atrun [-l load_avg] [-d]

DESCRIPTION
atrun runs jobs queued by at(1). It is a shell script invoking
/usr/sbin/atd with the -s [...]

atd – run jobs queued for later execution
USAGE
atd [-l load_avg] [-b batch_interval] [-d] [-s]

DESCRIPTION
atd runs jobs queued by at(1).

OPTIONS
-l Specifies a limiting load factor, over which batch jobs [...]

at – execute commands at a later time
USAGE at [-V] [-q queue] [-f file] [-mldbv] TIME at [-V] [-q queue] [-f file] [-mldbv] -t time_arg at -c job [job...] atq [-V] [...]