I just tried, I made myself administrator on CD05, but still have no access for writing (or change anything).
That with remote desktop I will read about myself, sounds interesting. Is that the way TeamViewer works?).

Yes, TeamViewer does many things and one is remote desktop.

Without knowing exactly what you are trying to do and where in the directory tree your trying to do it I can't provide specific help.

With Ubuntu the "administrator" is allowed to run commands as root using sudo or gsudo for graphical commands. Otherwise, you really only have write permissions to your home directory and /tmp.

I j'm just trying things out, such as make a new folder under /home/<user>, or a new file there.
On the other hand (just thinking loud) even if I am a GUI/admin, I don't have the right to change another persons GUI/admin, is that right? To do this I have to make myself superuser with sudo su first. Since I use Ubuntu, I don't really have a root user. I help myself with sudo <command>. It's not that important right now, I can help myself very well with what I have now: The ability to copy files from one P to another without using internet or USB.

How can I say ths is solved?

Using the thread tools pull down menu at the top of the page.

1 members found this post helpful.

Thank you very much for your help. This makes life a lot easier.
and this:
Logic will take you from A to B. Imagination will take you everywhere. - Albert Einstein
I like very much.
Have a nice time,
regards,
Dag