On Sun, 20 Feb 2022 13:11:36 +0000 Antony Stone <antony.st...@devuan.open.source.it> wrote:
> On Sunday 20 February 2022 at 12:57:07, Florian Zieboll via Dng wrote: > > > Dear list, > > > > I just want to share the two most important things I learned > > yesterday: > > > > 1.) I can "delete" files for which I do not have write permissions, > > if the containing directory is writable by me: > > Indeed - this came as a surprise to me when I first found it. > > The explanation is remarkably simple: > > Write permissions on a *file* determine whether you can modify the > *content* of the file. This has nothing to do with the *file name* > (renaming or deleting). > > Write permissions on *the containing directory* determine whether you > can delete or rename files in that contained directory. This is > because a directory is essentially a file with a special type of > content - names and pointers to other files (inodes). Hallo Antony, thank you for this impressively sleek explanation! Can you (or anybody else here) recommend some similarly well-worded resources (a book!) about these very basic principles, that help me getting my fragments of knowledge into the bigger context? As I believe that this topic is worth an own thread, I'll try to start it with a link to the "Dokumentation für Administratoren" of Munich's LiMux project (in german), which focuses on the application layer, but is a real pleasure to read: https://docplayer.org/67158191-Limux-dokumentation-fuer-administratoren-herausgegeben-vom-sachgebiet-linux-client-der-landeshauptstadt-muenchen-version-basisclient-1-1.html Best regards and libre Grüße, Florian _______________________________________________ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
