Ubuntu 20.04
Zoneminder does not appear as an installable application so I used apt-get which worked without error.
The package seems properly installed but does not appear in my Applications folder and will not run from the command line.
Is this application usable under Ubuntu? If so please advise how to run it and make it appear with my other applications.
thanks.
This application is web-based, not GUI - therefore it does not have any *.desktop file, so it is absolutely expected that its icon is not presented in menu.
You have to check its Apache configuration and use web-browser to get access to it.
Other good place to find help is official documentation (with assumption that you use ZoneMinder from official Ubuntu repositories).