How to check if a string contains a substring in Bash
You can use Marcus's answer (* wildcards) outside a case statement, too, if you use double brackets:
string='My long string'if [[ $string == *"My long"* ]]; then echo "It's there!"fiNote that spaces in the needle string need to be placed between double quotes, and the * wildcards should be outside. Also note that a simple comparison operator is used (i.e. ==), not the regex operator =~.