don't
i don't know why DIGIT gives away tarballs/deb/rpm of linux softwares as they require additional dependencies which maynot be present in your Linux installation. Instead, install from the ubuntu repo using the software centre/terminal.
Still, there is no harm in installing from the packages though. instead it will be a good and useful experience.
open the terminal
for tarballs, extract the archive and follow the instructions in the INSTALL file present in the extracted folder.
for deb, run sudo dpkg -i path_to_deb_file/xyz.deb