I entered sudo usermod -g www-data ftpuser
How do I return it to the default values?
Is it owned by root? If so it would be:
sudo usermod -g www-data root?
How do i check the ownership of www-data?
Groups don’t have owners.
Your first command, sudo usermod -g www-data ftpuser made ftpuser’s default group into www-data. If you ran sudo usermod -g www-data root, you would, in kind, make the root user’s group be www-data. That’s not a good idea.
Groups do not have owners. Files and directories (folders) have owners. Users belong to groups, groups have members and every user has a default group, which is the group that gets applied to the POSIX permissions of any files or directories that user makes.
Ok, i see where i went wrong.
Now I did:
sudo usermod -g root root
would make root back into the default group.
id root
uid=0(root)
gid=0(root)
groups=0(root)
Thanks for the explanation.