Run the following commands:
sudo sed -i 's/Prompt=lts/Prompt=normal/g' /etc/update-manager/release-upgrades sudo apt update
sudo sed -i 's/Prompt=lts/Prompt=normal/g' /etc/update-manager/release-upgrades
sudo apt update
sudo do-release-upgrade
sudo apt upgrade -y
Keep on pressing Enter key for every prompt asked in the Terminal.
Reboot the server
sudo reboot
Run the command to confirm the version:
lsb_release -a
Will give you the following output:
lsb_release -aNo LSB modules are available.Distributor ID: UbuntuDescription: Ubuntu 20.10Release: 20.10Codename: groovy