pixellany |
06-19-2012 06:19 AM |
Permissions on a file or directory are organized in 3 categories: Owner, group, and other. In each category, there are three types of permission: read, write, and execute. For a file, execute is used only when the file is some kind of executable code--including scripts. For directories, the execute permission also controls whether one is allowed to create new files or directories.
If. for example, you want to grant privileges based on group membership, then it does not matter who else is in that group----all members of the group will have the same privileges (controlled by what is in the "group" field in the file or directory permissions.
The use of "rbash" appears act as a layer on top of these basics--I'm not familiar with the details, but Google finds lots of information
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