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To highlight the difference between screen updates
If you need to keep an eye on a command whose output is changing, use the watch command. For example, to keep an eye on your load average
If you launch gnome-terminal manually, you can start with three open tabs
For example: check the APT security keys to make sure the Google digital signature was imported correctly
You can view the man pages from section five by passing the section number as an argument to the man command