测试用户名与密码是否正确

#!/bin/bash
#用户名为 tom 并且密码为 123456，则提示登录成功，否则提示登录失败
read ‐p "请输入用户名:"  user
read ‐p "请输入密码:"    pass
if [ "$user" == 'tom' ‐a "$pass" == '123456' ];then
echo "Login successful"
else
echo "Login Failed"
fi