The latest version of Ubuntu is 20.04, you can download this image from the download section. Since we are downloading Ubuntu 18.04, you need to open the following URL:
https://releases.ubuntu.com/18.04/
You’ll find everything related to this image here. Scroll down below and you’ll find the torrent file as well. Click the following link and our download will start right away. You’ve to be patient, it will be a 2GB download.