Basic Linux Shell Scripting for DevOps

Tasks

1 . Explain in your own words and examples, what is Shell Scripting for DevOps.

Shell scripting is a powerful tool commonly used across industries to automate tasks, test solutions, and increase efficiency.Shell scripting is a text file with a list of commands that instruct an operating system to perform certain tasks. A shell is an interface that interprets, processes, and executes these commands from the shell script. It can be particularly helpful to automate repetitive tasks, helping to save time and reduce human error.

Shell scripting is primarily used to automate repetitive system tasks, such as backing up files, monitoring system resources, and managing user accounts. By turning a series of commands into a script, system administrators can save time, increase accuracy, and simplify complex tasks. 

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

The line #!/bin/bash at the beginning of a script is called a shebang or hashbang. It specifies the path to the interpreter that should be used to run the script. In this case, it tells the system to use the Bash shell to execute the script.By including #!/bin/bash at the top of the script, we ensure that the script is executed with the Bash interpreter, which can be important because different shells may interpret commands and scripts differently.

Yes, we can use #!/bin/sh instead of #!/bin/bash. The #!/bin/sh line specifies that the script should be run with the Bourne shell or a compatible shell. This is usually a symbolic link to a shell that is compliant with the POSIX standard.

3 . Write a Shell Script which prints I will complete #90DaysOofDevOps challenge

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

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