Day 4 Task: Basic Linux Shell Scripting for DevOps Engineers.

Explain in your own words and examples, what is Shell Scripting for DevOps.
A shell script is a program that contains a sequence of shell commands that can be executed in a specific order to perform a particular task. it allows Devops to automate repetitive tasks and streamline the deployment and management of software applications.

What is #!/bin/bash? can we write #!/bin/sh as well?
#!/bin/bash is called a shebang or hashbang. It is a special line that tells the operating system what program should be used to interpret the commands in the script. In this case, #!/bin/bash indicates that the script should be interpreted by the Bash shell.

Yes, it is possible to use #!/bin/sh as well. sh is a simpler shell than Bash and it may be used in scripts where Bash-specific features are not required.

Write a Shell Script which prints I will complete #90DaysOofDevOps challenge
\>create a new file with the filename.sh
>vim filename.sh
\>To perform the insert operation in the editor press i
#!/bin/bash
echo "I will complete #90DaysOofDevOps challenge"
\>To exit press esc
\>To run the shell script first give the execution permission to the file
>chmod +x filename.sh
>./filename.sh

Write a Shell Script to take user input, input from arguments and print the variables.
To take input from users we have to use $1 for one argument and for n-number of args use $@.

Write an Example of If else in Shell Scripting by comparing 2 numbers