• https://stackoverflow.com/questions/7911669/how-to-create-a-file-in-ruby
• http://www.w3big.com/de/ruby/ruby-input-output.html
• https://alvinalexander.com/blog/post/ruby/how-write-text-to-file-ruby-example

in eine Datei schreiben:

open('/tmp/test01.txt', 'w') do |f|
  f.puts "Hello, world."
end

open('/tmp/test02.txt', 'w') { |f|
  f << "Four score\n"
  f << "and seven\n"
  f << "years ago\n"
}