Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/wily/main/binary-amd64/Packages 404 Not Found [IP: 91.189.91.23 80]

The wily version is in EOL (End of Life): no longer supported.

You must follow these steps to use apt-get, by setting the use of oldversion repositories:

1) modify with sudo the file /etc/apt/sources.list, e.g.:

sudo nano /etc/apt/sources.list

2) put into:

deb http://old-releases.ubuntu.com/ubuntu/ wily main universe restricted multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ wily main universe restricted multiverse

deb http://old-releases.ubuntu.com/ubuntu/ wily-security main universe restricted multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ wily-security main universe restricted multiverse

deb http://old-releases.ubuntu.com/ubuntu/ wily-updates main universe restricted multiverse
deb-src http://old-releases.ubuntu.com/ubuntu/ wily-updates main universe restricted multiverse

3) save the file

4) do: sudo apt-get update