How to upgrade Ubuntu 18.04 to 20.04 LTS

Описание: How to upgrade Ubuntu 18.04 to 20.04 LTS

1. Create a backup of your server or vm.
2. Upgrade all installed packages of Ubuntu version 18.04 by running sudo apt update && sudo apt upgrade command.
3. Reboot the Ubuntu Linux system by tying the sudo reboot command
4. Install the Ubuntu update tool, run: sudo apt install update-manager-core
5. Start the upgrade procedure, run: sudo do-release-upgrade
6. Reboot the box, run: sudo reboot
7. Verify upgrades