除了特定的用户所有者，每个文件和目录还具有一个组所有者。
In addition to a specific user owner, every file and directory also has a group owner.
这个脚本更灵活，因为它允许用户指定要搜索的任何文件和任何搜索目录。
This example is more flexible, as it allows users to enter any file they want to search for in any directory.
Linux锁定了某些文件和目录，这样即使帐户被盗，该用户也无法运行系统的关键程序。
Linux locks down certain files and directories so that even if a user account is compromised, that user can't run system critical applications.
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