auto_keygen (){
    /usr/bin/expect<<EOF
    # 设置超时时间,单位为  秒
    set timeout 30

    # 触发交互命令
    spawn   ssh-keygen

    # 开始捕获
    expect {

        # 当捕获到此次字符串时, 发送回车，并且继续捕获
        ".ssh/id_rsa)" { send "\n"; exp_continue }
        "no passphrase):" { send "\n"; exp_continue}
        "again:" { send "\n"; exp_continue }
    }

EOF
}


send_key () {
/usr/bin/expect <<EOF
set timeout 30

# 继续发送第二条命令
spawn ssh-copy-id root@$1
expect {
"yes/no" { send "yes\n"; exp_continue }
"password:" { send "upsa\n"} }
expect eof
EOF
}

pub_key_file=$HOME/.ssh/id_rsa.pub

if [ ! -f ${pub_key_file} ];then
    auto_keygen
fi

for ip in $(cat ./ips.txt)
do
   send_key $ip
done