Using Completion in the ksh Shell
ksh is another shell that offers command completion. You type part of a command, press twice, and ksh completes the command for you (see Code Listing 3.12). Using command completion in ksh isn't as easy as it is in zsh or bash, but the results are the same.
Code Listing 3.12. After listing the files and directories, we set our options, then successfully completed a command. The ^[^[ is how appears on the screen when the shell doesn't know to use it to complete commands.
To use completion in the ksh shell: