How to use the command `atrm` (with examples)
The atrm command allows users to remove jobs that have been scheduled using the at or batch commands. This command is particularly useful when there is a need to cancel or remove jobs that have been previously scheduled. The command takes as input the job number(s) assigned to each job and removes them from the queue.
Use case 1: Remove job number 10
Code:
atrm 10
Motivation: The motivation for using this use case would be the need to remove a specific job that has been scheduled using the at or batch commands. This could be due to a change in requirements or a mistake in the job scheduling.
Explanation: In this use case, the command atrm is followed by the job number 10. This instructs the command to remove the specific job associated with the given job number.
Example output: If a job with the job number 10 exists in the job queue, it will be removed and a confirmation message will be displayed indicating the successful removal of the job.
Use case 2: Remove many jobs, separated by spaces
Code:
atrm 15 17 22
Motivation: The motivation for using this use case is to remove multiple jobs at once without having to remove them individually using separate commands. This is useful when there are several jobs that need to be canceled or removed from the queue.
Explanation: The atrm command can accept multiple job numbers separated by spaces. In this use case, the command is followed by three job numbers: 15, 17, and 22. This instructs the command to remove all three associated jobs from the job queue.
Example output: If jobs with the job numbers 15, 17, and 22 exist in the job queue, they will be removed and a confirmation message will be displayed indicating the successful removal of the jobs.
Conclusion:
The atrm command is a useful tool for removing jobs scheduled by the at or batch commands. By specifying the job number(s) associated with the jobs, users can easily remove them from the job queue. This command provides a convenient way to cancel or remove specific jobs or multiple jobs at once, saving time and effort in managing scheduled jobs.
