How to add Ubuntu Desktop's default packages after completing a "Minimal Installation"?

Solution 1:

The metapackage you seek is ubuntu-desktop.

This will give you most of the stock Ubuntu Desktop, minus some applications:

$ sudo apt install ubuntu-desktop

This will give you the complete stock Ubuntu Desktop with all applications installed from the Desktop image:

$ sudo apt install ubuntu-desktop --install-recommends

Solution 2:

First, open the terminal and enter

sudo apt remove ubuntu-desktop

Next, enter this command, this will install most of the apps and packages which are installed with the normal installation.

sudo apt install ubuntu-desktop

Hope this helps :)