ssh-copy-id 安全地复制公钥到远程服务器上

[root@NB .ssh]# ssh-copy-id  -i id_rsa.pub " -p22 root@150.57.38.226"
root@150.57.38.226's password: 
Now try logging into the machine, with "ssh ' -p22022 root@123.57.36.227'", and check in:

  .ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.

#注意指定端口和用户@IP是用双引号的！！！！