Bash: Check if a Variable Contains a Specific String

You can use the '[[` operator in Bash to determine if a variable contains a specific string. Here's the syntax:

if [[ $variable == *cus* ]]; then
    echo 'Variable contains 'cus''
else
    echo 'Variable does not contain 'cus''
fi

In this example, '$variable' is the variable you want to check, and 'cus' is the pattern to match. If the variable contains the string 'cus', it will print 'Variable contains 'cus'', otherwise, it will print 'Variable does not contain 'cus'.