@frissdiegurke Thanks for the debug -- it's an unusual scenario, and has actually been in the NodeBB docs since the earliest commits*, but was removed perhaps a month ago because it's not a typical use case.
What I imagine happened was @lukelarris installed the package "node", instead of "nodejs":
Amateur Packet Radio Node program
The node program accepts TCP/IP and packet radio network connections and
presents users with an interface that allows them to make gateway connections
to remote hosts using a variety of amateur radio protocols.
If you install "nodejs" on top of that, the executable becomes "nodejs".
apt-get remove node followed by
apt-get install nodejs does not restore the proper paths, either, the correct steps are:
apt-get --purge remove nodejs node
apt-get install nodejs
* It's been in the docs "since the earliest commits" because when I first tried installing Node.js, I typed in
apt-get install node