Moving Jobs to the Background or Foreground with bg and fg
The shell has the concept of “foreground” jobs and “background” jobs. Foreground jobs are process groups with control of the terminal, and background jobs are process groups without control of the terminal.
Let’s say you started a job by running a program at the command line. Maybe something like this, which could take a while to run:
matthew@seymour:~$ find . -type f -printf "%s\t%p\n" | sort -n
When you run this, it starts in the foreground, meaning the terminal will be interactive with you only for this job until the job is complete. This particular job will find all files in the current directory and its subdirectories and then list them according to ...
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