Operating system foreground and background processes (for Linux)

The main differences between the two processes:
1. Foreground process user can operate, background process user cannot operate (except to turn it off).
2. The foreground process is not all controlled automatically by the computer, the background process is all automatic control by the computer.
3. Background process is generally used as a system service, can be submitted with crontab (Linux), edit or delete the corresponding job.

Main Features:
1. The foreground process can be displayed in the system in the form of Windows and dialog. Background process not.
2. A process that is lit in the taskbar can be called a foreground process. Not lit for the background process.
3. Foreground and background processes can sometimes be converted to each other. (Commands executed in Linux terminal Plus & for background commands)
4. Generally, the time-consuming order is transferred to the backstage execution.