两台linux ssh,无需密码

server1连接server2

server1 　　　　　　server2
s1私钥
s1公钥 ---------> ~/.ssh/authorized_keys

1)server1生成密钥对

　　server1#ssh-keygen

　　server1#ls /root/.ssh (id_rsa; id_rsa.pub)

2)server2用户家目录下有一个目录叫.ssh

　　server2#mkdir .ssh

3)server1将自己的公钥id_rsa.pub拷贝给server2

4)server2将这个文件放置在~/.ssh叫authorized_keys

　　server1#scp /root/.ssh/id_rsa.pub server2ip地址:/root/.ssh/authorized_keys

5)server1就可以无需密码连接server2