How to use a shell to determine if a variable contains …

In a Shell script, you can use the following method to determine if a variable contains a specific string:

1. if
2. Can you please rephrase the following sentence for me?

   Could you kindly paraphrase the following phrase?

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

1. in case
2. example

case $variable in
    *substring*)
        echo "Variable contains substring"
        ;;
    *)
        echo "Variable does not contain substring"
        ;;
esac

1. in case
2. Can you lend me a hand?

if [ "${variable}" = *substring* ]; then
    echo "Variable contains substring"
else
    echo "Variable does not contain substring"
fi

Please choose one of the methods based on your specific needs to determine whether a variable contains a certain string. Replace “variable” with the name of the variable you want to check and “substring” with the string you want to match.