一个锁定tty的简单脚本

#!/bin/bash
# lock tty
trap ' '  1 2 3 18
KEY=badboy ##密码自己设定
###input passwd
stty -echo
read -p "ENTER YOUR PASSWD: " KEY01
until  [ "$KEY01" = "$KEY" ]
do
   echo
   echo "PASSWD IS NOT RIGHT "
   read -p "ENTER PASSWD AGAIN :" KEY01
done
stty echo

echo