Well, we can add freenx to that list now...
Just like every tutorial ever:
"just type nxsetup --install --setup-nomachine-key"
Okay now I get an error...
"So there's nothing that could've gone wrong there, let's continue with the next step."
*frustratedly starts googling the error*
Google's response: here's everything in the world that uses "sed" that gives the same error, which is completely unrelated to your case of trying to install freenx server.
*furiously starts adding freenx into the search terms*
Google's response: nope.
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