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2009-11-14

at

AT and batch delayed command scheduling utility and daemon

NAME

atd - run jobs queued for later execution

SYNOPSIS

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

DESCRIPTION

atd runs jobs queued by at(1) .

OPTIONS

-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 Specify 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 syslog(3) . This option also implies -f.
-f Run atd in the foreground.
-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.

WARNING

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

FILES

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

BUGS

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