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Sometimes we will want to stop a process without terminating it.

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This is often done to lower the foreground process to move to the background.

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So stop a foreground process and place it in the background.

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Press control Z.

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Actually, let me write that down here.

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Control.

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Here.

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Control.

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Plus Z.

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Here, so you will want to press Ctrl Z to stop a foreground process and place it in the background.

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So let's try it.

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And at the command prompt here we will type the X logo.

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And here, as you can see, our X logo is opened right here now.

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And actually let's make it on the top so we will see what happens.

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Right now, always on top.

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Let's make it bigger here.

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So now let's press the Ctrl Z.

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And as you can see here, the we can interact with the bash, but also the logo X logo program is not

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terminated.

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So after stopping X logo, we can verify that the program has stopped by attempting to resize.

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As you can you see here.

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Yeah.

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It's not behaving as like the previous example, right.

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So the program.

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Stopped, um, by at when we attempt to resize the logo window.

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So we will see that it appears quite dead.

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So we can either continue the program execution in the foreground using the FG command.

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Or resume the program's execution in the background with the BG command here actually now we will pray

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and we will pray another control here.

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It's almost suspended here, as you can see here.

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It will not print our appropriate X logo right here.

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And let's now use the BG here.

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And as you can see here, it is also.

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Provide from our background here, but now we can also interact when we write here by BG instead of

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FG, we can also interact with the Terminal Bash script.

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So that's it.

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So with the FG command, the job spec is optional if there is only one job.

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So moving.

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So since we don't have any background job at that time, we didn't need to mention it, but if you do

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would want to mention it, you will write background.

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Firstly, you will write jobs as we did in previous and here.

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Now.

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After that you will write BG and your job and as you can see here, job already in background.

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So.

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Moving a process from the foreground to background is handy if we launch a graphical program from the

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command line, but forget to place it in the background by appending the trailing and operator.

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So why would we want to launch a graphical program from the command line?

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So there are two reasons for that.

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The program you want to run might not be listed on the window manager menus such as X logon.

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Here.

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We don't have x logo, right?

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X logo.

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We just only have run X logo here, which is this is just a comment that runs like X logo.

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But we don't have any additional nexus.

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Actually, let me.

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Close this previous X logo here.

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Here.

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We don't have X logo in our program.

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So biological program from the command line, you might be able to see error messages that would otherwise

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be invisible if the program were launched graphically.

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So sometimes a program will fail to start up when launched from a graphical menu by launching it from

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the command line.

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Instead, you may see an error message that will reveal the problem.

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Also, some graphical programs have interesting and useful command line options.