Day4: Basic Linux Shell Scripting for DevOps Engineers.

Day4: 90 days of DevOps -

1. What is Shell Scripting?

   Shell scripting is a computer program or a file which have commands in sequential order in order to execute particular tasks.

   The script is interpreted by a shell which can be a bash, zsh, sh, or Korn shell. A shell is a command line interpreter which is an interface to provide interaction between the user and the kernel.

2. What is #!/bin/bash? can we write #!/bin/sh as well?

   #!/bin/bash is also known as shebang. It is written in order to understand by the command line interpreter that the given script is set for bash.

   While we can write #!/bin/sh as well, and bash(bourne again shell) is sh just with better syntax and more features.

3. Write a Shell Script that prints I will complete #90DaysofDevOps challenge.

   #!/bin/bash

   echo I will complete the #90DaysofDevOps challenge.

4. Write a Shell Script to take user input, input from arguments, and print the variables.

   #!/bin/bash

   echo What is your name?

   read name

   echo My name is $name.

5. Write an example of If else in Shell Scripting by comparing 2 numbers.