File content indexer for Ubuntu?

[rikona]

On Sat, 8 Jan 2022 19:58:30 +1100
Owen Thomas <owen.paul.thomas at gmail.com> wrote:

> Hello Ubuntu users.
> 
> I want to index the contents of files in a directory tree. I found
> recoll
> <https://www.fossmint.com/recoll-file-text-search-tool-for-linux/> -
> a utility that appears to do the job and also has a GUI to make the
> novice experience less threatening - but the installation
> instructions seem perhaps too bespoke for something I would have
> thought was a feature that was popular enough to be available as a
> package from the Ubuntu Software centre. Is there anything else?

I've used this for many years - great pgm - and I'm rather a novice. :-)
What is the problem with install?

Rik