Foreground and Background Jobs
There are two types of jobs. One is a job running as it connects with a terminal – called a foreground job. The other is a job running in the background – called a background job. Understanding these concepts is important for managing multi-tasking jobs.
Foreground Job
When you run a command on a terminal, usually it is executed as a foreground job. As one terminal has only one command line, only one job can be running at the same time.
When you execute only a single command, usually the computer completes the process within a second. This makes it harder for us to see the difference between foreground jobs and background jobs. To see the difference clearly, try a practice task below.
Practice 1
Objective:
Understand how the foreground job works
1. Create a shell script
First, let's create a shell script that requires a longer processing time. The shell script (loop.sh file) below counts down numbers from 1,000,000.
Use vim to create a she
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