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This shortcut will stop a running program and gives you control of the shell.
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If you want to stop using a program running in the foreground, just press this key combination. This will stop a running program immediately. These are the keys you should press in order to break out of a command or process on a terminal. If you could only remember one shortcut, this would be the chosen one. It will either automatically complete what you were typing or it will show all the possible results for you. Just start typing a command, filename, directory name or even command options and hit the tab key. It will save you so much time in the Linux command line. This is the Linux shortcut you cannot live without.
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Do note that I have used the capital letters in the keyboard shortcuts but this does NOT mean that you have to press the shift key while using these shortcuts.
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