I have installed OMV6 and read most of the docs, but I simply can't find a direct way to simply block deletion of files to any user. Yes, the users must create new folders and files and have access (R+W), but they can NOT delete files. It doesn't work through bash and I can't see the option on OMV6 (would appreciate if there were any secret plugin or extra that does that). I've tried the sticky bit perm:
sudo chmod +t /sharedfolder
Checking file permissions, they are now sticky bits (drwxrwxr-t), but I can simply remove them and any user can do so. I have also used chattrd, but it just makes them immutable:
sudo chattr +i *
Also, within the folder, applying the following:
chmod -R a+rw *
chattr +a *
And to the whole directory:
chmod +t shared/
That agains just makes the files immutable.
Obs(rant): Honestly cannot find a single reason why is this so complicated to do in both *Nix systems and OMV, since it's the most common user mistake ever. I need the folder to be public, I need them to write/read and I need them to not delete them. Seems like I'm the first person on earth that wants to do that.
