[root@centos ~]# scp ~/.ssh/id_rsa.pub root@centos2:~/.ssh/centos.pub
The authenticity of host 'centos2 (centos20)' can't be established.
RSA key fingerprint is 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'centos2' (RSA) to the list of known hosts.
root@centos2's password:
id_rsa.pub                                 100%  406     0.4KB/s   00:00
			

[root@centos2 ~]# cat /.ssh/centos.pub >> ~/.ssh/authorized_keys
			

[root@centos ~]# ssh  root@centos2 ls .ssh #確認
authorized_keys
id_rsa
id_rsa.pub