"Work" operations in Linux shell

Shell is the COMMAND of Linux and DOS. COM. It allows you to pause the execution of a thread, or change the foreground to the background, and the background to the foreground for execution. The thread is also called 'work '.
1) check how much work is there:
The jobs listed in $ jobs are differentiated by the number allocated by a shell, rather than the PID.
2) pause a foreground thread:
$ (But not always valid)
3) suspend the foreground program:
$
(Ditto)
4) Move a suspended program to the background for further execution:
$ Bg
5) raise a program in the background execution to the foreground:
$ Fg
6) again, we need to cut down a thread:
$ Kill %
Here % May be 1, 2, 3 ,... with these commands, You Can format the disk at the same time, compress the file, compile a program, decompress the program, and still see the prompt number and cursor waiting for your command.