Disclaimer: I answered the question that I believe was incorrectly marked as a duplicate.
This question, in which the OP accidentally changed the permissions of one system directory, was marked as a duplicate of this question, in which the OP accidentally changed the permissions of many system directories, recursively.
I believe that this might be an error.
The answers to the latter question state that the OP needs to completely reinstall their system or restore it from a backup. This is correct in that case, because it would be overwhelmingly difficult to restore permissions on so many directories. However, in the former question, the OP only needs to undo one change. I would consider the answers to the latter question to be very bad advice in the case of the former because of the avoidable trouble they would cause to the OP to solve their problem.
If the OP of the former question understood that the
chmod command that they ran only affected one of the system directories described in the answers to the latter question, then it's possible that they could synthesize that information to use a Live CD to revert their change, but I do not think it is safe to assume that they — and everyone else who finds the duplicate and follows the link — would do that.
Furthermore, there was some confusion in the answers to the former question about how the
chmod command worked. The first answer (now deleted) assumed that
chmod had been run with the
-R argument (which I have definitely seen more commonly than without on this site), but the OP did not include it as part of the command they had run. The second answer would be correct if the OP had run
chmod /* instead of
This confusion could make it more difficult to acquire the understanding of permissions/
chmod needed to resolve the problem using the answers in the latter question.
Given this situation, is it correct to mark the question as a duplicate?