ATD(8) Linux Programmer's Manual ATD(8)
atd - run jobs queued for later execution
atd [-l load_avg] [-b batch_interval] [-d] [-s]
atd runs jobs queued by at(1).
-l Specifies a limiting load factor, over which batch jobs should
not be run, instead of the compile-time choice of 0.8. For an
SMP system with n CPUs, you will probably want to set this
higher than n-1.
-b Specifiy the minimum interval in seconds between the start of
two batch jobs (60 default).
-d Debug; print error messages to standard error instead of using
-s Process the at/batch queue only once. This is primarily of use
for compatibility with old versions of at; atd -s is equivalent
to the old atrun command. A script invoking atd -s is
installed as /usr/sbin/atrun for backward compatibility.
atd won't work if its spool directory is mounted via NFS even if
no_root_squash is set.
/var/spool/at The directory for storing jobs; this should be mode 700,
/var/spool/at/spool The direcotry for storing output; this should be
mode 700, owner daemon.
/etc/at.allow, /etc/at.deny determine who can use the at system.
at(1), atrun(1), cron(8), crontab(1), syslog(3), at.deny(5),
The functionality of atd should be merged into cron(8).
local Mar 1997 ATD(8)