Shell Script: Checking if a Variable is Non-Empty Using 'if [ -n "$FOUND_PROCESS" ]'

This is an if statement in a shell script that checks if the variable '$FOUND_PROCESS' is non-empty or not.

The -n option of the test command ([ ]) checks whether the length of the string is greater than zero. If the string is non-empty, the condition is true and the code inside the if statement will be executed.

For example, if the variable '$FOUND_PROCESS' contains the process ID of a running process, the condition will be true and the code inside the if statement will be executed.