CASE Statement in Bash [Example]

The following article describes the basic syntax and includes a simple example of the BASH CASE statement usage.

The CASE statement is the simplest form of the IF-THEN-ELSE statement in BASH.

HowTo : Check If a String Exists

Sometimes, we need to check if the pattern presents in a file and take some actions depending on the result.

It can be done with the help of 'exit status codes'. Each Linux command returns a status when it terminates normally or abnormally

You can use command exit status in the shell script to display an error message or perform some sort of action.

HowTo : Check If a File Exists

While creating BASH Scripts, it is commonly helpful to check if a file exists before attempting to perform some action.

This is a job for test command (the same as []). This command allows you to do various tests, and sets its 'exit code' to 0 (TRUE) or 1 (FALSE), whenever a test succeeds or not.