Learn Linux Shell Scripting - Fundamentals of Bash 4.4

The at queue

As soon as you start scheduling jobs, you'll find yourself in a situation where you either messed up the time or the content for a job. For some jobs, you can just add a new one and let the other fail. However, there are certainly instances where the original job will wreak havoc on your system. In this case, it would be a great idea to delete the incorrect job. Luckily, the creators of at foresaw this problem (and probably experienced it too!) and created this functionality. The atq command (short for at queue), shows you the jobs currently in the pipeline. With atrm (don't think we need to explain that one), you can remove jobs by number. Let's look at an example of multiple jobs in the queue, and removing one:

reader@ubuntu:~/scripts/chapter_14$ ...