Linux user that can read-only all files? [closed]

Question

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How can I create a user with read-only access to all files? (ie root without writing permissions)

Is it possible to create a user in Linux/Unix that can see all files on the system, but in a read-only capacity?

Answer 1

You can't do this with the classic unix permissions model. You may be able to do something with SELinux or with raw ACLs, but I don't know anything about those options.