I have no SUDO rights, yet I want to install and run RoR. How can I do it?

When I insert the following command: sudo add-apt-repository ppa:aapo-rantalainen/rigsofrods it asks for my password, and then says this, which is like same on every command I issue: Sorry, user mike is not allowed to execute '/usr/bin/add-apt-repository ppa:aapo-rantalainen/rigsofrods' as root on Satellite How can I bypass the terminal during installation?

If you do not have permission to install software, then please ask your system administrator to do so. Alternatively, ask your system administrator to add you to the sudo group so you can perform system administrative tasks yourself.

Rigs of Rods may be installed and run as user by downloading the zip file of the Portable edition. After download, the program folder can be moved to a convenient location. Within the folder, there is a script RunRoR. cd into that folder and start the program with the command ./RunRoR after