https://fossbytes.com/ubuntu-21-04-hirsute-hippo-download-and-features/
Upgrade Ubuntu 20.04 to 21.04 Hirsute Hippo Beta: Check Steps!
Jul 12, 2021 - Ubuntu 21.04 Beta Is Here: Here's How To Upgrade From Ubuntu 20.04, 19, 18. Ubuntu 21.04 Hirsute Hippo Beta release is now available to download.
ubuntu 20 04hirsute hippoupgrade