I also try to use the command prompt on the desktop directory, but it states permission denied. Who is denying permission? I am the only user on my computer.
Open your terminal and type as
in the filename you have to place the filename of your
Open a terminal (by pressing CTLR+ALT+T) and then change to the directory where the .deb file is. Assuming that the .deb file is in the Downloads folder, type this:
If dpkg prompts you for something, just type Y (which stands for "yes"). After that, your package should have been installed correctly.