Centos7 Putty SSH key registration

1. Open the local computer PuTTYgen program, click Generate to generate the key, you can then set one password, save public and private keys to a local file, save, best multiple backup
2. Centos password to login remote
   vim ~ / .ssh / authorized_keys
3. Paste the generated public key to authorized_keys,: wq save
4. Change permissions
   chmod 400 ~ / .ssh / authorized_keys
5. Configure Putty client, open Putty, Set Session
   select Connection-> Data, set up a login name
   and then select Connection-> SSH -> Auth load a previously saved private key
   and then select the Session, Session set name, save Session
6. After double-clicking to open the Putty client can log into a remote server Session
7. After verifying a successful login, shut down the remote server password to log in
   to edit / etc / ssh / sshd_config file, the following settings:
   RSAAuthentication yes
   PubkeyAuthentication yes
   PermitRootLogin yes
   PasswordAuthentication NO
   final restart SSH: service sshd restart