运行grpck检查组时，我发现以下错误：
'twinky' is a member of the 'foo' group in /etc/group but not in /etc/gshadow
'dipsy' is a member of the 'foo' group in /etc/group but not in /etc/gshadow
'laalaa' is a member of the 'foo' group in /etc/group but not in /etc/gshadow
'po' is a member of the 'foo' group in /etc/group but not in /etc/gshadow
'noonoo' is a member of the 'foo' group in /etc/group but not in /etc/gshadow
'dipsy' is a member of the 'foo' group in /etc/group but not in /etc/gshadow
...
... 等等。我不知道这是怎么发生的，我想把它清理干净。我知道我可以手动编辑/etc/gshadow，但我宁愿让操作系统来做，以防止拼写错误和手动操作。
有什么可以自动将群组协调到 gshadow 中吗？也许是类似的东西（编造的）：
# grpfix foo
我尝试使用 man 来搜索各种与组相关的命令，也在 Google 上搜索过，但到目前为止我还没有找到答案。