cygwin mkgroup（272）：[1707]网络地址无效

我安装了cygwin64并尝试执行该命令

$mkgroup-l/etc/组

但是我得到了错误

SYSTEM:S-1-5-18:18:
NT SERVICE+TrustedInstaller:S-1-5-80-956008885-3418522649-1831038044-1853292631-2271478464:328384:
mkgroup (272): [1707] The network address is invalid.

以下是我到目前为止所做的事情

Copying skeleton files.
These files are for the users to personalise their cygwin experience.

They will never be overwritten nor automatically updated.

'./.bashrc' -> '/home/saiki//.bashrc'
'./.bash_profile' -> '/home/saiki//.bash_profile'
'./.inputrc' -> '/home/saiki//.inputrc'
'./.profile' -> '/home/saiki//.profile'

saiki@MSaiki ~
$ mkpasswd -l > /etc/passwd

saiki@MSaiki ~
$ mkgroup -l /etc/group
SYSTEM:S-1-5-18:18:
NT SERVICE+TrustedInstaller:S-1-5-80-956008885-3418522649-1831038044-1853292631-2271478464:328384:
mkgroup (272): [1707] The network address is invalid.

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我应该怎么做才能解决这个问题？

可能是

mkgroup-l>/etc/group

？无论如何，读作

/etc/group

和

/etc/passwd

并不严格需要。谢谢你：）