## read命令 read是Bash的内建命令，主要用于从键盘读取内容赋值给变量，它有以下常用参数： * -p :指定多个变量 ``` #!/bin/bash read -p “please input your name " name echo "your name is $name" exit 0 ``` * -n :计数输入的字符 ``` #!/bin/bash read -n6 -p “please input your password(lengh must be over 6 numbers)" passwd exit 0 ``` * -s :隐藏输入，不回显内容到终端 ``` #!/bin/bash read -s -n6 -p “please input your password(lengh must be over 6 numbers)" passwd exit 0 ``` * -t :超时等待时间 ``` #!/bin/bash read -t 5 -p “please input your name" name if [ $? -eq 0 ];then echo "your name is $name" else echo "timeout" fi exit 0 ```