What is a command shell?
Answer:
A program that interprets commands
Allows a user to execute commands by typing them manually at a terminal, or automatically in programs called shell scripts.
What is BASH?
Answer:
Bourne Again SHell
A shell written as a free replacement to the standard Bourne Shell (/bin/sh).
Originally written by Steve Bourne for UNIX systems.
All of the features of the original Bourne Shell, plus additions that make it easier to program with and use from the command line.
Since it is Free Software, it has been adopted as the default shell on most Linux systems.
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