格式
case 变量名 in
value1)
command
;;
value2)
command
;;
value3|value4)
command
;;
*)
command
;;
esac
举例
"$1"表示输入的第1个参数
"$2"表示第2个参数
#!/bin/bash
case $1 in
start)
echo "starting..."
;;
stop)
echo "stopping..."
;;
reboot|restart)
echo "restarting..."
;;
*)
echo "Usage:{start|stop|restart|reboot}"
;;
esac
[root@localhost wang]# sh -x case.sh
+ case $1 in
+ echo 'Usage:{start|stop|restart|reboot}'
Usage:{start|stop|restart|reboot}
[root@localhost wang]# sh -x case.sh start
+ case $1 in
+ echo starting...
starting...
[root@localhost wang]#
[root@localhost wang]# sh -x case.sh
+ case $2 in
+ echo 'Usage:{start|stop|restart|reboot}'
Usage:{start|stop|restart|reboot}
[root@localhost wang]# sh -x case.sh start
+ case $2 in
+ echo 'Usage:{start|stop|restart|reboot}'
Usage:{start|stop|restart|reboot}
[root@localhost wang]# sh -x case.sh start stop
+ case $2 in
+ echo stopping...
stopping...
[root@localhost wang]#
case后面也可以直接跟参数
[root@localhost wang]# sh -x case.sh
+ case "start" in
+ echo starting...
starting...
[root@localhost wang]# sh -x case.sh stop
+ case "start" in
+ echo starting...
starting...
[root@localhost wang]#
