I want to share a folder for two users, here is what I did: created group add users to group set chmod set chown set setgid 2775 reboot After that: echo test > /Common/testfile - group readable&writable Created file using Nautilus - group readable, but not writable Copied file using Nautilus - group readable, but not writable Created file using gedit - group readable&writable Why? Is it a bug? This was on a clean Ubuntu 10.10 installation.