1、安装openssh、openssh-server
2、启动sshd：service sshd start
3、设置开机自动启动sshd：chkconfig --level 35 sshd on
4、建立私钥公钥：ssh-keygen -t rsa
[user@centos64 ~]$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/wspjing/.ssh/id_rsa): //此处直接按回车即可
Enter passphrase (empty for no passphrase): //设置私钥使用密码，要求4个字符以上
Enter same passphrase again:
Your identification has been saved in /home/wspjing/.ssh/id_rsa.
Your public key has been saved in /home/wspjing/.ssh/id_rsa.pub.
The key fingerprint is:
fa:a2:fe:4e:8b:ab:dc:cb:73:ab:6f:42:a7:4a:94:52 user@centos64
The key's randomart image is:
+--[ RSA 2048]----+
| |
| |
| E |
| . . |
|. o S |
| o . .. |
| .. oo |
| o o+o+o |
| ++X&*o. |
+-----------------+
5、设置公钥
[user@centos64 ~]$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
[user@centos64 ~]$ rm -f ~/.ssh/id_rsa.pub
6、将私钥 id_rsa 下载到windows系统里。
7、用puttygen转换id_rsa，“load”--“All files”--找到“id_rsa”文件，打开，输入上面的密码，会提示“Successfully imported...“，“确定”--“Save private key”，此过程中的其他选项均为默认。
8、打开putty软件，左边“Connection”--“Data”，右边"Auto-login username“后面输入私钥对应的用户名；左边“Connection”--"SSH"--"Auth“，右边"Browse..."，找到私钥文件，扩展名为"ppk"的文件；左边"Session",右边Host Name下输入服务器IP地址，"Save Sessions"下输入要保存的快捷名，如"auto",再点击“Save”。
9、点击"open"，提示
Using username "username".
Authenticating with public key "imported-openssh-key"
Passphrase for key "imported-openssh-key":
输入上面设置的密码即可
