Use Putty Connect to Server With Private key

1. Generate Private Key And Public key With Putty Key Generator
2. create directory ".ssh" under the user's home directory
3. create file "authorized_keys2" under the directory named ".ssh"
4. edit file "authorized_keys2" with value "ssh-rsa "+public - key value + " rsa-key-20110608" (change "rsa-key-20110608" to your key's comments)
5. change ".ssh" and "authorized_keys2" 's owner to target user
6. change ".ssh" and "authorized_keys2" 's permission to 711
7. set putty auth type with private key
8. end