Install Quartus Prime by executing the installer (execute with sudo). I choose the following installation path: /opt/intelFPGA_lite/19.1/ There are some Issues you have to solve when using Quartus ...

NOTE: As of ModelSim 18.0 it appears that it is not necessary to install freetype-2.4.12 in Step-3 anymore! It seems to be working fine with the builtin freetype-2.8.10 in Fedora-28. ModelSim Starter ...