I applied for an account but I ca n’t download these softwares. I searched for all the questions and found no conclusion. Can you give me a download link for these softwares? thank you very much
You can download Quartus 19.1 Lite for Linux from below link.
Quartus 19.1 lite only supports Cyclone IV E & Cyclone IV GX devices not other cyclone IV devices.
To use cyclone IV device you have to use quartus 14.1.