Users and groups work essentially the same way in Linux that they do in Windows, except that only one group can be associated with a system resource.

在Linux中管理用户和组的方式与Windows中本质上是相同的，但是Linux中只能有惟一的组可以关联到一个系统资源。

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Listing 3 shows you how to do this on Fedora Core 4 Linux using the groupadd command; other UNIX systems have similar utilities or detailed instructions for adding new groups and users.

清单3显示了如何在Fedora Core 4 Linux上使用groupadd命令进行此任务；其他UNIX系统具有用于添加新组和用户的类似实用工具或详细说明。

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On Linux systems, where users do not have private groups the umask normally defaults to 0022, which removes group and other write permission from new files.

在Linux系统上，用户没有专用组的的情况下，umask通常默认为0022，它可以从新文件中删除组和其他写权限。

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The ambiguities of the GNU Public license are responsible in part for Apple's lack of interest in developing for the many Linux distributions that are licensed under GPL. By contrast, said Sanchez, BSD groups do not demand that users of FreeBSD or NetBSD code contribute their innovations to the community, and are therefore more friendly to corporations.

CNN: Apple warms up to open source community