After executing java -jar MooshakInstaller.jar as root from the directory to where you downloaded the file, depending on your terminal, a graphical user interface or a command line user interface will guide you trough the installation. When launching the installer you can use the following options and system properties:

-cui
Force the use of a command line interface. This is the default on a headless environment.
-Dbackspace=no
If your console doesn't handle backspace then define this system property to improve the output of the command line interface. This option is ignored on the GUI.
-gui
Force the use of a graphic user interface. This is the default on a graphical environment.
-norootcheck
The installer should be executed as root to grant the required permissions to the sandbox. If really want to install Mooshak without granting these permissions then use this flag. Have in mind that submissions will report an error.

If you have any problem send an email to zp@dcc.fc.up.pt.