At command for regularly executing a program in Linux

/*************************************** ******************************
* Author: Samson
* Date: 04/29/2014
* Test platform:
* 3.11.0-12-generic # 19-Ubuntu
* GNU bash, version 4.2.45
**************************************** ****************************/

In windows, there is a fairly easy-to-use command: at, its mission is to be able to regularly execute a task, for example, when downloading a movie on a dark night, but I don't want to keep it, but it's impossible to keep it. If I don't shut down, I'm more sorry for humans. at that time, I can use the at command to call it shut down at, so the command is probably as follows: at 3: 00 shutdown-s-f

In windows, enter at/In the cmd black box /? Let's take a look at the help. Now there is no windows environment. You can't cut the picture.

Of course, Linux also has such a command called at, which is similar to the at command under win. The specific parameters are different, and the power of at in Linux is not comparable to that of win, example:

/Usr/bin/at-f/home/fuck/test. sh now + 2 min

In this example, run/home/fuck/test after 2 minutes of the current time. sh script program. For more details about the at command in Linux, please install the Linux release and enter man at in the command line.