To enable root account, use the command:sudo passwd rootThis will prompt for a new root password and once confirmed, the root account can be used to login.To disable root account in Ubuntu, lock the root account by using the command:sudo passwd -l rootTo work on a root console, use the following commandsudo -i
In 2017, with the release of Delphi 10.2 Tokyo, Embarcadero introduced a specialized implementation of the Observer pattern into the System.Classes unit. While it has been in the wild for 9 years, it remains a "hidden" architecture for many, primarily because it serves as the invisible engine behind LiveBindings. Other than live bindings, you can also use the Observer pattern as a way to update component settings to the Windows registry, an .ini file, or persist it elsewhere.
System.Classes