Shell in Linux

A shell is a command-line interpreter: it takes commands and executes them.Bash (Bourne-again shell) is the default shell for most current Linux distributions (and Mac OS X) and can be run on most Unix-like operating systems.To check what shell you are currently using, open the console, type echo $SHELL, and press Enter. It should return a pathname ending with /bash.

Editors in linux -   nano,vi,vim(vi improved),pico