I've installed Tex Live 2015 following these instructions.
When I try to use the script "getnonfreefonts" from the tug website I get these errors:
sudo texlua install-getnonfreefonts
sudo: texlua: command not found
sudo -s
texlua install-getnonfreefonts
The program 'texlua' is currently not installed. You can install it by typing:
apt-get install luatex
even though LuaTeX is installed.
texlua -v in fact shows This is LuaTeX, Version.... (If I run texlua -v after sudo -s though, it says The program 'texlua' is currently not installed... again.