Text files containing commands to execute by a shell are called shell scripts
variables usually store data either in the form of characters or numbers.
Q #1) What is Shell?
Answer: Shell is a command interpreter, which interprets the command given by the user to the kernel. It can also be defined as an interface between a user and the operating system.
#2) What is Shell Scripting?
Answer: Shell script is a series or sequence of UNIX commands written in a plain text file. Instead of specifying one job/command at a time, in shell scripting, we give a list of UNIX commands to execute.