Tab completion

From Granular Linux Documentation

Did you know that while issuing commands in the command-line (Konsole), you need not type the full name of the command to issue it? Here is where the TAB button on your keyboard comes to help. Say, you were to issue a command like "grub-install", you would type just "grub-i" and press TAB once. The command-line will automatically complete the command for you. If there are more than one command beginning with the characters you typed, pressing TAB will display a complete list of those commands. For example, type "drak" and press TAB, you'll see a list of 51 commands beginning with "drak". Similar rule applies to files and directories in your present working directory.