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This video is
about interactive shell jobs.

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So what is a job? When a user runs
a command, this command is started as a foreground job.

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And foreground job means that it occupies
your terminal. You can't do anything anymore.

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Users have some options to manage their
own jobs, and the challenge with the

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foreground job is that while it is
running, the current console is occupied and

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you might be interested in running
a process in the background instead.

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So if the process is already running, you can stop it using Control
Z and then type the BG command to run it in the background.

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You can also start a new process immediately in
the background by using an ampersand behind the command.

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And you can use Jobs to
get an overview of currently running jobs.

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And if there is one specific job that
you want to move to the foreground, well,

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you use FG to move it from the
background to the foreground. Let me show you.

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So I'm going to
start a couple of jobs.

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First job,
sleep one hour.

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Then we sleep for 10 minutes
and we sleep for five minutes.

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I'm doing that with the ampersand behind it
because that runs them immediately in the background.

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As you can see, there's also
a Firefox job running in the background.

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Well, you know what, I want to
move that to the foreground FG1 and now

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it is running in the foreground, which
means that it's occupying my terminal. Doesn't mean

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that I automatically see the graphical window
that it starts, because that is elsewhere.

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If I happen to not like
that, well, I have choices. And one

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choice is to Control Z&BG to
continue running it in the background.

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I can also put it in the
foreground. So FG1 and Control C, that will

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interrupt the job. As you can see
now, all of these jobs are visible using

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jobs, and this is about all
that you can do to manage them.

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As a user, you can always manage your own job. So if
you want to make sure that your system is a little bit less

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busy, you can kill all of these sleep jobs. Do I really
want to do that? No, because it's not causing any harm anyway.