A few hours later I had lots of .gz files in my /sw/src folder, among which I found lilypond-2.1.26.tar.gz. I unzipped that, and it expanded to a folder called lilypond-2.1.26, containing lots of promising stuff. I created a file called test.ly, containing the text
<x-tad-bigger>\score {
\notes { c'4 e' g' }
}
</x-tad-bigger>
The command
lilypond test.ly
produces the response
lilypond: command not found.
Similarly with ly2dvi
So I guess the formatting engine is kicking around somewhere, but where? Thanks.