我在Windows 7下的Cygwin中安装OpenSSH来安装Hadoop。
我之前安装了 OpenSSH，但有密码。所有删除密码的尝试都失败了，所以我重新安装了 Cygwin。我也想要没有密码的 OpenSSH，并按照这些操作指示。
但是它不允许我将密码留空。这是为什么？我该怎么办？
附加信息：我正在以管理员权限运行 Cygwin bash。我的 Windows 没有设置密码。
我看到以下内容：
User@computer ~
$ chmod +r /etc/passwd
User@computer ~
$ chmod u+w /etc/passwd
User@computer ~
$ chmod +r /etc/group
User@computer ~
$ chmod u+w /etc/group
User@computer ~
$ chmod 755 /var
User@computer ~
$ touch /var/log/sshd.log
User@computer ~
$ chmod 664 /var/log/sshd.log
User@computer ~
$ 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
*** 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: []
*** 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: The following privileged accounts were found: 'cyg_server' .
*** 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) no
*** Query: Please enter the password for user 'cyg_server':
*** Query: Please enter the password for user 'cyg_server':