. You often enter the name of a file or directory as part of a command. You can complete the file or directory name automatically by entering the the first few characters of its name and then pressing a particular key. This feature is available with all shells except the Bourne shell. Finding out which shell you are using . Filename completion with the C shell . Filename completion with the TC shell . Filename completion with the Korn shell . Filename completion with the Bourne Again SHell .