Schedule your tasks with 'at' utitlity

Paras Nath Chaudhary · October 27, 2019

In this post, I am going to share you about a utility in Linux for scheduling your scripts. I will be showing how you can use a very simple and easy utility called ‘at’. First of all, if its not already install you can install it by running:

$ sudo yum install at -y

Now that at is installed. You can start the atd daemon:

$ sudo yum start atd

We are all set we can now schedule tasks. For our case we will use an example script ‘’ which will broadcast a message to the wall: echo “Script is running” | wall We will schedule the script to run now:

$ sudo at -f now

We can run at a specific time as:

$ sudo at -f 10:30

We can view the scheduled tasks by running atq command:

$ sudo atq

To remove a task from the at queue, you can run ‘at -d task_number’. For example to remove task with id 4 we would run :

$ sudo at -d 4

By default the queue name of tasks added with ‘at’ command is a. You can set a new queue name with -q option. For example

$ sudo at -q c -f 12:12

Allowed names for queue are a-z and A-Z. In the upcoming posts, I will be writing about scheduling with ‘cron’. So stay tuned. 🙂

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