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this post was submitted on 27 Jun 2025
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What exactly does that command do
It sets permissions (
changemodification rights) on all files (-R= recursive, stepping down through directories) in the file system (hence starting at/) so that they can be read, (re)written and executed as programs by all users (the777part).000would be no permissions for anyone (except for therootuser), which would be just as bad.Excellent summary. Just as a bit of trivia I'll add that Linux file permissions go like
r w x(read write execute) =4 2 1, so taken all together a7means the indicated user can do all those operations.And yeah, it breaks your system in surprising ways. Most people would just have to start over.
gives all users on the system read and write access to any and all files and resources