0027read命令

Posted 2020-12-25 linux777

#read命令从控制台读取数据赋值

[[email protected] ~]# read a b

ab dc

[[email protected] ~]# echo $a

ab

[[email protected] ~]# echo $b

dc

        #结合echo使用

        echo -n "enter a name:" ; read name

        [[email protected] ~]# echo -n "enter a name:" ; read name

enter a name:jsdfl 

[[email protected] ~]# echo $name

jsdfl

        

        #-p 替代echo输出，-t设置过期时间

        read -p ‘enter a user name:‘ name

        read -p ‘enter a user name:‘ -t 5 name

        #给默认值

        [ -z "$name" ] && name=‘washington‘

来自为知笔记(Wiz)