本文作者: 不祥
until
    echo List Directory..........1
    echo Change Directory........2
    echo Edit File...............3
    echo Remove File.............4
    echo Exit Menu...............5
    read choice
    test $choice = 5
    do
        case $choice in
        1) ls;;
        2) echo Enter target directory
           read dir
           cd $dir
           ;;
        3) echo Enter file name
           read file
           vi $file
           ;;
        4) echo Enter file name
           read file
           rm $file
           ;;
        q|Q|5) echo Goodbye;;
        *) echo illegal Option
    esac