/usr/bin/combust is in ruby-combustion 0.5.4-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | #!/usr/bin/ruby
# -*- mode: ruby -*-
require 'combustion'
require 'combustion/generator'
Combustion::Generator.start
|