New virtual machine and new Kubuntu installation. Good days ahead again!
I just found out that old ways of using apt-key program are replaced in new Ubuntu Linux releases by Apt directory /etc/apt/trusted.gpg.d/. It is similar to another Apt directory /etc/apt/sources.list.d/ with files describing software repositories.
Good opportunity to learn something new :)
To install official Google Chrome including automatic updates, I used following tutorial:
