Linux Process foreground and background management commands

CTRL + Z: stop the process of occupying the terminal on the Shello Terminal

Jobs: You can view the stopped process and the number num.

BG: resumes the previous process with the first serial number. You can run BG % num or BG num on the background to stop the process. (The background here indicates that the process does not occupy the current terminal)

FG: you can restore the process that runs the first serial number on the foreground. You can restore the process that runs the first serial number on the foreground by using FG num or FG % num.