One day Linux Command (19) jobs fg bg Job Management

Job: a process or a group of processes associated with pipelines/redirection.

Foreground: The environment in which the client session interacts with you.

Background: The environment that does not interact with you, but is related to the current terminal session. For example, if you cannot enter a background job or control a background job (for example, you cannot use Ctrl + C to disable it), the background job is also disabled when the current terminal session is closed.

Background: that is, the system background. There is no direct relationship with the terminal session.

Run in background Mode

&: Add & after executing the job command &. For example, $ echo file1> file2 &

CTRL + Z: press Ctrl + C to convert the job running in the foreground into a background and suspend it. Then run BG % <number> on the background.

Jobs

Syntax: jobs [-LRS]

Description: displays background tasks.

Parameters:

-L: Besides listing the job number and command string, the PID Number is also listed;-R: only listing the work in the background run;-S: only list the jobs that are being paused in the background.

FG BG

Syntax: FG/BG [% <number>]

Note: FG transfers jobs in the background to the foreground for execution. BG switches the background job from pending to running.

Parameter: % <number> number indicates the serial number of the background job, which can be queried by the jobs command.