This page leads you to upgrade Ubuntu system to the latest version.
This guide only applies to officially released Ubuntu images, check here for official images.
sudo apt update sudo apt full-upgrade sudo do-fenix-full-upgrade sync sudo reboot
If you encounter the following errors:
khadas@Khadas:~$ sudo apt update Ign:1 https://dl.khadas.com/repos/vim3 focal InRelease Hit:2 http://ports.ubuntu.com focal InRelease Hit:3 http://ports.ubuntu.com focal-security InRelease Hit:4 http://ports.ubuntu.com focal-updates InRelease Hit:5 http://ports.ubuntu.com focal-backports InRelease Err:6 https://dl.khadas.com/repos/vim3 focal Release Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate. Could not handshake: Error in the certificate verification. [IP: 188.8.131.52 443] Reading package lists... Done E: The repository 'https://dl.khadas.com/repos/vim3 focal Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.
Follow these instructions to fix it:
sudo sed -i 's/https/http/g' /etc/apt/sources.list.d/fenix.list sudo apt update sudo apt full-upgrade sudo do-fenix-full-upgrade sync sudo reboot