what is shell
Shell. A shell is a software interface that's often a command line interface that enables the user to interact with the computer. Some examples of shells are MS-DOS Shell, command.com, csh, ksh, and sh.Below is a picture and example of what a Terminal window with an open shell.ou are here: Dictionary S-Definitions. A shell is a software interface that's often a command line interface that enables the user to interact with the computer.