1.在客戶端生成公鑰私鑰對
[root@localhost ~]# ssh-keygen -t rsa
一路默認回車，系統在/root/.ssh下生成id_rsa、id_rsa.pub
2.查看系統生成的公鑰私鑰對
[root@localhost ~]# ls /root/.ssh id_rsa id_rsa.pub
3.配置互信,將當前id_rsa.pub 的值存入互信ip的authorized_keys文件中；
[root@localhost .ssh]# cat id_rsa.pub
[root@localhost ~]# vi authorized_keys
4.現在可以測試連接其他服務器是否不需要密碼登錄，可以看到確實成功了。可來回切換
[root@localhost .ssh]# ssh 192.168.10.102
Last login: Wed Mar 11 08:58:44 2020 from 192.168.10.128
[root@localhost ~]# ssh 192.168.10.128
Last login: Tue Mar 10 17:00:39 2020 from 192.168.10.102
[root@localhost ~]# ssh 192.168.10.102
Last login: Wed Mar 11 09:01:35 2020 from 192.168.10.128
[root@localhost ~]# ssh 192.168.10.128
Last login: Tue Mar 10 17:03:28 2020 from 192.168.10.102
[root@localhost ~]#