まずGtk2, WebKitが要る Gtk2 sudo apt-get install libgtk2.0-dev sudo gem install gtk2 WebKit sudo apt-get install libwebkit-dev git clone https://github.com/magec/rbwebkitgtk cd rbwebkitgtk && ruby extconf.rb && make && sudo make install screenshot.rb # -*- encoding: UTF-8 -*- require 'rubygems' require 'open-uri' require 'gtk2/base.rb' require 'webkit' require 'timeout' class Screen < Gtk::Window def i