happy Linuxing
Frankly, the Java calc program isn't nearly as popular as it was a few years back.
Now, every Tom, Dick, 'n web site has their own.

Some even use satellite-based maps (hate 'em myself, but folks love 'em!) -
The SatFinder program suffers from poor support.
Meaning, the guy doesn't update his beautiful program very often.
Not even satellite names. And many have changed in the last few years.
But, what's nice, is that you can fully edit his bird list, and customize it.
For years, I used a personal list that had many of the popular satellites split out and highlighted.
Recently, I visited the author's web site and noticed he's redone the list, and updated his cities.
Now, I'm running the stock version again.
Don't really like seeing all the Euro birds at all, much less at the top of the listing, but I'm not sure it's hardly worth futzing with again.
But, YOU CAN, if ya like!
It's just a simple text file.
Glad you guys are happy with a Linux-friendly application.
There's a ton of great info on the SatGuy's forum. - :up - I found SatFinder here, myself.