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atd command in Linux with examples
atd command in Linux with examples
Last Updated : 04 Apr, 2019
atd
is a job scheduler daemon that runs jobs scheduled for later execution. These jobs are one-time task(not recurring) at a specific time scheduled using 'at' or 'batch' utility.
Syntax:
atd [-l load_avg] [-b batch_interval] [-d] [-f] [-s]
Options:
- -l : Specifies a limiting load factor, over which batch jobs should not be run, instead of the compile-time choice of 1.5.
- -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.
Starting atd:
- To start atd in the current session, use below command:
$ service atd start
- To start atd automatically at boot time, use below command:
$ chkconfig atd on
- While using 'at' utility, the following issue can be seen: It means that atd is not running and needs to be started.
Stopping atd:
- To stop atd in the current session, use below command:
$ service atd stop
- To disable atd from starting at boot time, use below command:
$ chkconfig atd off
Restarting atd:
To restart atd, use below command.
$ service atd restart
Checking atd status:
To determine if atd is running or not, use below command:
$ service atd status
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