Confusing message in Quartus II (Linux)

Go to https://www.altera.com/download/software/quartus-ii-se (https://www.altera.com/download/software/quartus-ii-se)

You will see a "Quartus II Software (1 of 2)" and a "Device Family Files (2 of 2)" executable. You need to download and run the second one (Device Family Files).

There is a 4GB limit on self-extracted EXE files, so going forward, you will need to download two files.

Hope this Helps