A:主机shell-com B主机：NBU-master1-com
ssh-keygen -t rsa
需要按下三次回车，这个时候会在~/.ssh文件下生成文件
ssh-copy-id ~/.ssh/id_rsa.pub root@192.168.1.102
[root@shell1-com ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@192.168.1.102
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@192.168.1.102's password:
Now try logging into the machine, with: "ssh 'root@192.168.1.102'"
and check to make sure that only the key(s) you wanted were added.
[root@shell1-com ~]# ssh root@192.168.1.102
Last failed login: Fri Jun 15 10:15:25 CST 2018 from 192.168.2.31 on ssh:notty
There was 1 failed login attempt since the last successful login.
Last login: Fri Jun 15 10:10:03 2018 from 192.168.2.31
[root@nbu-master1 ~]# exit
logout
Connection to 192.168.1.102 closed.
这样就可以实现A主机登录B主机免密码。
仅供参考
标签：ssh,免密,登录
