problem in installing quartus ii on ubuntu 16.04

Hi,

Try once after following the below steps.

1. sudo apt install build-essential

2. Installing libpng12

Follow the steps from below link

https://www.altera.com/downloads/software/faq/dnl-v11-download-installation-faq.html#x02

Let me know if this has helped resolve the issue you are facing or if you need any further assistance.

Best Regards,

Anand Raj Shankar

(This message was posted on behalf of Intel Corporation)