Introduction to Linux Job management

Concepts involved in Job management
Front desk (foreground): an environment in which the prompt can be operating system
Backstage (Backgroud): Put in the background to pause or run
The working status in the background is divided into 2 types:
Pause Status: Use CTRL + Z
Run Status: direct command to run in the background, using the commond& symbol


where [number] the number in parentheses is the work number, and the + number represents the work that was recently thrown in.
JOBS-L lists work numbers and PID,

        涉及的命令有        fg：将后台工作拿到前台工作     [%job_number]        bg：将工作在后台的下的状态变成运行中     [%job_number]        kill：管理后台的工作，必须加上    %工作号码，因为不加%会杀掉进程而不是工作。

Introduction to Linux Job management