Login and click on desired Quartus version download
Click in the individual file links to start download (Akamai DLM3 Download Manager might not work).
Extract Quartus installer.
Run setup.sh: ./setup.sh
Select desired devices.
For launching modelsim, install libxft2 32 bit version library: sudo apt install libxft2:i386. Then execute ./vsim in the path intelFPGA_lite/17.1/modelsim_ase/linuxaloem/