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problems with sudo permissions - /var/lib/sudo owned by uid

I recently installed Ubuntu Server and put the GUI on so I can get the hang of Linux.
However, I can't seem to gain access to the /var/www/ folder so I can put and edit my html files...

I tried what was on this post: Change folder permissions and ownership and I still can't move files. (Except if I use nautilus)

When I tried what Ikke suggessted, it appeared to have worked (as in no errors thrown in terminal) but when I still can't move files into the folder.

If I use nautilus and look at the permissions for /var/www it lists me as the owner (is just says my username), Create and Delete files for folder access. And --- for file access. If I change file access to Read and Write it just goes back to --- once I hit Apply Permissions to Enclosed Files.

What am I missing?