[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！！！！