Your point is well made, but rather moot, not because of Oracle owning Java, nor for the language itself not being of use in the world, but because... If you're running Linux, you're probably the calibre of computer user whom knows a little about programming and so you know that today there are more powerful languages
(probably the languages you are using everyday) and Java is very much a secondary language for you.
This is my personal opinion of course, but I see it from a historical perspective, you see I was there, in line, outside the delivery suite as James Gosling was throwing the first edition of the Java language out there.
I was at University at the time, and had learned to program in Pascal (procedurally - I've recovered now thanks for asking), and the tutors, lecturers and even me myself got very excited about Java. Would it become the web defacto?... Would it become the only language, it does everything right, but has all these classes and libraries to utilise built in, and it handles memory clean ups for you freeing the programmer to be more creative and productive than C or C++... Right??!?!? Right?!?!?!
No, that's not how it went down, Java has its place, and that place is not really on my desktop, not on the desktop of anyone I know working in the software engineering game. I admit Java is useful, I actually do like to point people at it when they say "I want to learn how to program" rather than point them at C# (at least at the present). But in my humble, but informed opinion, Java's place for a Linux user is very much undermined by better performing more technically able languages, like C and C++...
If it were not so, there'd be a Java based operating system, maybe even the Linux Kernel ported to it
but there's not, and so it has a limited place.
Perhaps LXF could cover it as a dedicated learning language segment, but they've already covered the basics of coding time and time again.
P.S. I also hate the code style James Gosling (and hence Java) is listed in, where's that curly brace?... Oh oh there it is