atd(8) -- Linux man page
NAMEatd - run jobs queued for later execution
SYNOPSISatd [-l load_avg] [-b batch_interval] [-d] [-s]
DESCRIPTIONatd runs jobs queued by at(1).
- 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.
- Specifiy the minimum interval in seconds between the start of two batch jobs (60 default).
- Debug; print error messages to standard error instead of using syslog(3).
- 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.
WARNINGatd won't work if its spool directory is mounted via NFS even if no_root_squash is set.
FILES/var/spool/at The directory for storing jobs; this should be mode 700, owner root.
/var/spool/at/spool The directory for storing output; this should be mode 700, owner root.
SEE ALSOat(1), atrun(1), cron(8), crontab(1), syslog(3), at.deny(5), at.allow(5).
BUGSThe functionality of atd should be merged into cron(8).