fs="xfs"

for fs in ext2 ext3 ext4 reiserfs jfs xfs
do
    echo -n "$fs: "
    case $fs
    in
    ext2)
        echo obsolete. come on
        ;;
    ext[34])
        echo linux extended file system
        ;;
    xfs)
        echo "need -f"
        ;;
    *)
        echo nothing special known about it
    esac
done