case.sh

#!/bin/bash
read -p "please input a file name:" file

cat <<- MENU
  d or D:delete file
  s or S:show file detail infomation
  q or Q:quit
MENU

read -p "input your option:" option
case "$option" in
  d|D) echo "delete $file"
       rm "$file" ;;
  s|S) ls -l "$file" ;;
  q|Q) exit 0 ;;
    *) echo "invalid option"
       exit 1 ;;
esac
exit 0

cat << DataTag
This is usually used as a menu 
DataTag

感觉用gist做笔记什么的挺不错的！ 随时记录 ！ 还可以修改， 还有代码高亮！