On Mon 01 Jan 2018 at 05:23:29 (-0600), Richard Owlett wrote: > As user "richard" I created 3 files. > I later wanted to protect them totally from accidental change. > For each file, I went to Properties->Permissions and changed Access > for Owner, Group, and Others to "Read Only".
No, you set the access to "Read Permission". Each bit grants a permission (on the file itself; its directory has to be considered separately). > As user "richard" I was able to delete them with Caja. > *UNDESIRABLE* > As "root" I changed Owner and Group to "root" leaving Access for all > as "Read Only". > > User "richard" could still *DELETE THEM*! > "Read Only" evidently does not mean what it implies. If you read "Read Only" in Linux documentation you should consider filing a bug against it. As for these "implications", you might be assuming MSDOS semantics from your past experience. Cheers, David.