The easiest way to install Jug is to use Pacman. Once you have
Pacman installed and set up (which is extremely easy to do), you can
install Jug like this:
mkdir install-dir
cd install-dir
pacman -get http://www.hep.wisc.edu/~dan/jug/pacman3:Jug-DB
For more information on installation, see Installing Jug.
If you wish to do a manual installation (not using Pacman), you may download the tarball and install it yourself.