shell脚本编写输入数字执行对应的命令

vim aa.sh

#!/bin/bash
echo "*cmd meau**  1—date 2–ls 3–who 4–pwd"

read -p "please input a number 1-4: " n
case $n in
   1)
      date
   ;;
   2)
      ls
   ;;
   3)
      who
   ;;
   <