Linux Commands Examples

A great documentation place for Linux commands


run jobs queued for later execution

see also : at - cron - crontab


atd [-l load_avg] [-b batch_interval] [-d] [-f] [-s]

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atd 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 1.5. For an SMP system with n CPUs, you will probably want to set this higher than n-1.


Specify 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). This option also implies -f.


Run atd in the foreground.


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.


/var/spool/cron/atjobs The directory for storing jobs; this should be mode 700, owner daemon.

/var/spool/cron/atspool The directory for storing output; this should be mode 700, owner daemon.

/etc/at.allow, /etc/at.deny determine who can use the at system.


atd won’t work if its spool directory is mounted via NFS even if no_root_squash is set.


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

see also

at , at.deny, at.allow, cron , crontab , syslog.

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