Currently Being ModeratedMar 26, 2013 3:57 AM (in response to Socorro-Mac)
Your OS X is full of thousands of files and folders with things like this. Many are invisible. Inexperienced users should not remove anything because it could stop something working.
Currently Being ModeratedMar 26, 2013 4:11 AM (in response to Socorro-Mac)
The user groups you are finding are special groups reserved for those needing 'root' access, the owner of everything on a Unix-based computer system. Members of the wheel group are allowed to carry out most functions that are reserved to root. The installer group has permissions necessary to conduct software and operating system installation, privliges that go beyond a standard user as they may need to touch files in protected areas, such as system-level files.
Information is cached that helps the operating system perform tasks quickly, and by no means should be removed, even if you have permission level to do so.
There are many files and folders, aka directories, in Unix systems that appear to be empty. They, themselves, may be but they link to other files and folders where the actual material resides. If in the full permission fields you see an 's' for example, that is a soft link to another location where the actual data resides.
Mac OS X is a Unix-based operting system. The kernal, Darwin, is the actual command-level operating system and is based on the FreeBSD Unix system, Berkley Software Development.
Bottom-line, please DO explore and learn more about the makeup of your Mac OS X system, but DO NOT remove any files or folders without first learning their use. You can do serious damage to the system by doing that.
Currently Being ModeratedApr 1, 2013 8:11 AM (in response to Ralph Landry1)
Thank you Ralph!
I'm trying to learn... and you certainly helped me a lot. But what about that "nobody" - you two (Ralph and Neville) did NOT mention it. It's the first time I see permission given to "nobody" + no one at all.
Currently Being ModeratedApr 1, 2013 8:27 AM (in response to Socorro-Mac)
Currently Being ModeratedApr 1, 2013 8:28 AM (in response to Socorro-Mac)
Nobody really excludes everyone except root...that means everyone in the wheel group that can share privliges with root but not be root. If you can su to root, or login as root you can still go to those places since root owns everything on the system and cannot be denied any action.
One of the reasons Apple has disabled root as an available user, unless you take specific steps to enable root. If you do that you need to be aware of the power root has...as root you can literally erase the entire operating system without the system telling you NO DON'T DO THAT...so if you enable root please be extremely careful about what you do and be sure you understand all of the power you have.