Can I install and use Avast when running Ubuntu?

Very simple (or so I thought) just install Ubuntu on my new all-in-one and instal Avast. Not that easy as I cannot find any information on Ubuntu services since around 2012 in the Avast website. I hope I can still use it as it has always been the best and I have been using Avast all day, every day since the free copy in 2000-2001. Can anyone help please?

The only Unix version of avast is for Business use - there is no stand alone user version, like that for Windows or Mac.

I can’t recall how long it has been like this, but it is a very long time.