"Access Control Lists (ACLs) allow you to provide different
levels of access to files and folders for different users. The Red
Hat Enterprise 5/CentOS 5 have implemented ACLs in the file system
by default. This new feature will allow you to set a file where one
user can read, other users cannot read and yet other users are able
to read and write to the same file. This was not possible
"ACLs are an important tool that administrators must understand
as well as educate users how to employ them properly..."
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