Linux系统shell脚本基础之case判断语句

Posted 2022-05-23 江湖有缘

Linux系统shell脚本基础之case判断语句

• 一、脚本要求
• 二、脚本要求
• 三、执行脚本

一、脚本要求

1.用户输入三个one,two,three后，输出对应的语句
2.用户输入非以上三个，输出提示，请输入one,two,three

二、脚本要求

[root@192 scripts]# cat ./case.sh 
#!/bin/bash
########################################
#Author:jeven
#time:Sat 21 May 2022 11:36:55 AM CST
#filename:case.sh
#Script description:
########################################
read -p "please input your choice:"  CHOICE

case "$CHOICE" in  
     "one")
           echo "Your choice is ONE"
	   ;;
     "two")
	   echo "Your choice is TWO"
	   ;;
     "three")
           echo "Your choice is THREE"
	   ;;
     *)
           echo "Usage   $0 one|two|three"
	   ;;
esac 

三、执行脚本

root@192 scripts]# ./case.sh 
please input your choice:one
Your choice is ONE
[root@192 scripts]# ./case.sh 
please input your choice:two
Your choice is TWO
[root@192 scripts]# ./case.sh 
please input your choice:three
Your choice is THREE
[root@192 scripts]# ./case.sh
please input your choice:1a1a1a
Usage   ./case.sh one|two|three