Stopped process demonstration

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• In one window run htop and filter to 'perl'.
• In the second window run perl -e '<STDIN>'
• Look at the htop display to see the process appearing with a state S
• Press Ctrl-z in the window with the process.
• Look at the htop display to see the process appearing with a state T
• bg will move the process to the background but the state will stay in T.
• fg will move it to the foreground and the state will change to S.
• ENTER will finish the process.
• Do the same with this example: perl -e 'sleep 1 while 1'
• In this case moving to the background will already move the process to S state.