I am using Ubuntu 11.10 and get the following error when using the terminal:
lee@theia:~$ regedit/home/lee/desktop/Direct3D.reg bash: regedit/home/lee/desktop/Direct3D.reg: No such file or directory
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, see the FAQ.
It means that the string you entered,
It seems like you wanted to do
That way, the line resembles line that you would use on Windows to import entries to Windows registry. But there's no such thing as Windows registry (and no such thing as Direct3D) in Ubuntu, which (no offense meant) qualifies such attempt for an IT joke.
(Also paths are case-sesitive on Ubuntu and I believe that default desktop folder is named