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Linux, in the tradition of UNIX-like operating systems, implements file system permissions using a rather coarse scheme. While this is sufficient for a surprisingly large set of applications, it is too inflexible for many advanced scenarios. For that reason, all the major commercial UNIX operating systems have extended this simple scheme in one way or the other. For Linux, such extensions are not stable enough yet. Standard distributions do not include ACLs so far.

Linux, in the tradition of UNIX-like operating systems, implements file system permissions using a rather coarse scheme. While this is sufficient for a surprisingly large set of applications, it is too inflexible for many advanced scenarios. For that reason, all the major commercial UNIX operating systems have extended this simple scheme in one way or the other. For Linux, such extensions are not stable enough yet. Standard distributions do not include ACLs so far.