This is indeed the official way, but rather complicated. Systemd still ships with an rc.local service that, when enabled, allows you to run a command...
The answer to your question is very simple: never download deb files. Install software using apt. This installs software packaged and tested for your...
You should certainly, particularly a new user of Ubuntu, steer well away from searching for and installing .deb packages from anywhere other than the...
VNC is tied to X/Windows and 24.04 defaults to Wayland for the display server. Lots of X/Windows programs don't work under Wayland and some that are...