I downloaded the neuropol font but I can't install it. I use a scientific Linux operating system and I wanted to use it on Libreoffice Impress. I downloaded the file "neuropol x free.ttf" when I double click it a window pops up with a box that says install, when I hit install it immediately says install failed. Can somebody here offer any help.

Did you download a ttf? Then you did not download it here.

Have you tried that ? http://www.dafont.com/fr/faq.php#linux
Have you unzip the file in a folder or have you tried to instal it directly from the unzip window ?