Runs scripts written for the Bourne shell. For the Korn shell the: Command full-path name is /bin/ksh. Non-root user default prompt is $. Root user default prompt is #. 4. The GNU Bourne-Again Shell. The GNU Bourne-Again shell (bash): Is compatible to the Bourne shell. Incorporates useful features from the Korn and C shells.
The C shell (csh) is a command shell for Unix-like systems that was originally created as part of the Berkeley Software Distribution (BSD) in 1978. Csh can be used for entering commands interactively or in shell scripts. The shell introduced a number of improvements over the earlier Bourne shell designed for interactive use.
Zsh is another shell which has similarities to bash and ksh. Originating in the early 90s, zsh sports a number of useful features, including spelling correction, theming, namable directory shortcuts, sharing your command history across multiple terminals, and various other slight tweaks from the original Bourne shell.