這篇文章主要是爲我在win7（64位）下搭建hadoop環境所準備的。首先參照在cygwin使用總結這篇文章在cygwin中安裝所必須得軟件包，然後如下進行操作：
sony@sony-VAIO~ $ ssh-host-config
*** Info: Generating /etc/ssh_host_key
*** Info: Generating /etc/ssh_host_rsa_key
*** Info: Generating /etc/ssh_host_dsa_key
*** Info: Generating /etc/ssh_host_ecdsa_key
*** Info: Creating default /etc/ssh_config file
*** Info: Creating default /etc/sshd_config file
*** Info: Privilege separation is set to yes by default since OpenSSH 3.3.
*** Info: However, this requires a non-privileged account called 'sshd'.
*** Info: For more info on privilege separation read /usr/share/doc/openssh/READ
ME.privsep.
*** Query: Should privilege separation be used? (yes/no) no
*** Info: Updating /etc/sshd_config file
*** Query: Do you want to install sshd as a service?
*** Query: (Say "no" if it is already installed as a service) (yes/no) yes
*** Query: Enter the value of CYGWIN for the daemon: netsec] netsec
*** Info: On Windows Server 2003, Windows Vista, and above, the
*** Info: SYSTEM account cannot setuid to other users -- a capability
*** Info: sshd requires. You need to have or to create a privileged
*** Info: account. This script will help you do so.
*** Info: You appear to be running Windows XP 64bit, Windows 2003 Server,
*** Info: or later. On these systems, it's not possible to use the LocalSystem
*** Info: account for services that can change the user id without an
*** Info: explicit password (such as passwordless logins [e.g. public key
*** Info: authentication] via sshd).
*** Info: If you want to enable that functionality, it's required to create
*** Info: a new account with special privileges (unless a similar account
*** Info: already exists). This account is then used to run these special
*** Info: servers.
*** Info: Note that creating a new user requires that the current account
*** Info: have Administrator privileges itself.
*** Info: No privileged account could be found.
*** Info: This script plans to use 'cyg_server'.
*** Info: 'cyg_server' will only be used by registered services.
*** Query: Do you want to use a different name? (yes/no) yes
*** Query: Enter the new user name: sony
*** Query: Reenter: sony
*** Warning: Privileged account 'sony' was specified,
*** Warning: but it does not have the necessary privileges.
*** Warning: Continuing, but will probably use a different account.
*** Warning: The specified account 'sony' does not have the
*** Warning: required permissions or group memberships. This may
*** Warning: cause problems if not corrected; continuing...
*** Query: Please enter the password for user 'sony':
*** Query: Reenter:
*** Info: The sshd service has been installed under the 'sony'
*** Info: account. To start the service now, call `net start sshd' or
*** Info: `cygrunsrv -S sshd'. Otherwise, it will start automatically
*** Info: after the next reboot.
*** Info: Host configuration finished. Have fun! $ net start sshd
發生系統錯誤 1069 --- 表示由於登錄失敗而無法啓動服務
解決方法：在cmd中輸入services.msc即可打開windows的服務，在服務中把密碼改對就可以了。
（在上面配置ssh的過程中我的用戶名是：sony 密碼是：123456）
sshd服務裝成功如下：
sony@sony-VAIO ~ $ net start sshd
CYGWIN sshd 服務正在啓動 .
CYGWIN sshd 服務已經啓動成功接下來是配置無密碼登陸：
sony@sony-VAIO ~ $ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/sony/.ssh/id_rsa):
Created directory '/home/sony/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/sony/.ssh/id_rsa.
Your public key has been saved in /home/sony/.ssh/id_rsa.pub.
The key fingerprint is:
e8:38:5e:e3:bb:cf:76:03:61:5f:f2:68:ed:a3:49:db sony@sony-VAIO
The key's randomart image is:
+--[ RSA 2048]----+
| |
| |
| |
| .o . . |
| ..So * |
| o . + o |
| o + o.. |
| . + o..o+o |
| . +=o.+oE. |
+-----------------+
sony@sony-VAIO ~ $ cd .ssh/
sony@sony-VAIO ~/.ssh $ ls
id_rsa id_rsa.pub
sony@sony-VAIO ~/.ssh $ cp id_rsa.pub authorized_keys
sony@sony-VAIO ~/.ssh $ ls
authorized_keys id_rsa id_rsa.pub驗證如下：
sony@sony-VAIO ~/.ssh $ ssh localhost
The authenticity of host 'localhost (::1)' can't be established.
ECDSA key fingerprint is 5f:21:b1:24:80:92:f6:af:3e:e3:a8:f9:cb:a4:4f:ec.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts.
sony@sony-VAIO ~ $ who
sony tty0 2011-11-25 15:42 (::1)
搞定 ~_~