两步验证跳板机自动登录，依赖安装 oathtool

gistfile1.sh

#!/usr/bin/expect -f

set timeout 30
set secret YOUR_SECRET
set username YOUR_NAME
set password YOUR_PASSWORD
set host YOUR_HOST
log_user 0

spawn oathtool --totp --base32 $secret
expect -re \\d+
set otp $expect_out(0,string)

spawn ssh -2 $username@$host
expect "Verification code:"
send "$otp\n"
expect "Password:"
send "$password\n"
interact