Shell&Bash

What's is bash and What is shell and the difference

Bash (bash) is one of many available (yet the most commonly used) Unix shells. Bash stands for "Bourne Again SHell", and is a replacement/improvement of the original Bourne shell (sh).

Shell scripting is scripting in any shell, whereas Bash scripting is scripting specifically for Bash. In practice, however, "shell script" and "bash script" are often used interchangeably, unless the shell in question is not Bash.

Shell&bashsysadmin

refer to https://fatcatsk.github.io/shell.html