google_driveをまずインストールして、とのことなのでインストールを試みる。
# gem install google_drive
Building native extensions. This could take a while...
ERROR: Error installing google_drive:
ERROR: Failed to build gem native extension.
/usr/bin/ruby2.0 extconf.rb
mkmf.rb can't find header files for ruby at /usr/share/ruby/include/ruby.h
Gem files will remain installed in /usr/local/share/ruby/gems/2.0/gems/nokogiri-1.6.7.2 for inspection.
Results logged to /usr/local/share/ruby/gems/2.0/gems/nokogiri-1.6.7.2/ext/nokogiri/gem_make.out
できない….
参考： http://nyaahara.hatenablog.com/entry/2015/01/11/094951
