Learn Linux Shell Scripting - Fundamentals of Bash 4.4

Time syntax

When you use at, you can specify the time absolutely, like we did in the previous example, or relatively. An example of relative would be in 5 minutes or after 24 hours. This is often easier than checking the current time, adding your desired interval to it, and passing it to at. This works with the following syntax:

reader@ubuntu:~/scripts/chapter_14$ at now + 1 minwarning: commands will be executed using /bin/shat> touch /tmp/at-fileat> <EOT>job 10 at Sun Nov 25 10:16:00 2018reader@ubuntu:~/scripts/chapter_14$ dateSun Nov 25 10:15:20 UTC 2018

You always need to specify relative to which time you want to add the minute, hour, or day. Fortunately, we can use now as a keyword for the current time. Do note that when dealing with ...