Many a times we need to schedule a task for a future time, say in the evening at 8 P.M. on a specific day. We can use the at
command in such a situation.
Sometimes we need to repeat the same task at a specific time, periodically, every day, or every month. In such situations, we can use the crontab
command.
Let's learn more about the utility of the at
command. To use the at
command, the syntax is as follows:
$ at time date
The following are the examples of the at
command:
Control + D
command will save the at
job. The task will be executed at 11.15 A.M. This command will log messages to the log.txt
file at 11.15 A.M.:$ at 11.15 AM at > echo "Hello World" > $HOME/log.txt at > Control + D
$ at 10am mar 31 2015 at> echo "taxes due" | mail jon at> ^D
$ at 11 am may 20
at
command can be listed using the following command:$ atq
atq
command, we can use the following command:$ atrm job-id