At

The at command is a Linux command-line utility used to schedule a job for later execution. The utility reads commands from standard input and groups them into an at job, which executes only once. The alternative for at is a crontab. However, while at jobs execute only once, cron jobs are recurring events.

Open an `at` prompt to create a new set of scheduled commands, press `Ctrl + D` to save and exit:

      at hh:mm

  Execute the commands and email the result using a local mailing program such as Sendmail:

      at hh:mm -m

  Execute a script at the given time:

      at hh:mm -f path/to/file

  Display a system notification at 11pm on February 18th:

      echo "notify-send 'Wake up!'" | at 11pm Feb 18

Some Examples¶

Schedules an echo command invocation five minutes after scheduling the job
```
echo "hello" | at now +5 minutes
```
schedules an echo command invocation at 5PM
```
echo "hello" | at 5PM
```
View the scheduled job
```
atq
```

Remove a Scheduled Job

atrm ID # ID can be known from atq command first column

Useful Links¶

How to Use the Linux at Command