Just as you can send processes to the background, you can also bring them back to the foreground. This is done by using the foreground (fg) command. Let's return to our example. If you wanted to bring the at command back to the foreground, you would simply enter the following:
With the fg command, you can quickly bring the process you want to work on to the foreground. When you are done working with this process, you can send it back again with the bg command.