Day 4 Shell Shock: Exploring Number Comparison in Bash Scripting

Shell scripting for DevOps involves using shell scripts to automate various tasks in the development and operations lifecycle. It allows DevOps engineers to streamline processes, automate repetitive tasks, and maintain consistency across environments. Shell scripting is particularly useful in DevOps for tasks such as deployment, configuration management, monitoring, and logging.

#!/bin/bash is known as a shebang or hashbang. It's the first line of a shell script, specifying the interpreter that should be used to execute the script. In this case, it indicates that the script should be interpreted by the Bash shell. Yes, you can also write #!/bin/sh, which indicates the Bourne shell interpreter.

Here's a simple example of a shell script that prints "I will complete #90DaysOfDevOps challenge":

A shell script to take user input and print the variables:

An example of if-else in shell scripting comparing two numbers: