Sudo apt update error setting up jetson nano

I am having the same issue described here:

But I am having a hard time understanding the solution (new to jetson nano).
I do not have “/etc/apt/apt.conf” file and I am working directly on the jetson nano with a attached screen.
Please advise!

Hi bshi42,

Please check your network proxy setting issue first.
After fix the network issue, run sudo apt-get update again.
If still get errors, please share your error message.

I am not sure how to check my network proxy setting.