I tried installing
rails according to this guide, and when I do, I get this error:
$ sudo gem install rails WARNING: Error fetching data: Errno::ENOENT: No such file or directory - getaddrinfo (http://rubygems.org/specs.4.8.gz) WARNING: Error fetching data: Errno::ENOENT: No such file or directory - getaddrinfo (http://rubygems.org/latest_specs.4.8.gz) Building native extensions. This could take a while... ERROR: Error installing rails: ERROR: Failed to build gem native extension. /usr/bin/ruby1.9.1 extconf.rb /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError) from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' from extconf.rb:1:in `<main>' Gem files will remain installed in /var/lib/gems/1.9.1/gems/json-1.8.0 for inspection. Results logged to /var/lib/gems/1.9.1/gems/json- 1.8.0/ext/json/ext/generator/gem_make.out
I've never seen anything like this before, so any feedback would be greatly appreciated.