Failed to build gem native extension when install RedCloth-4.2.9 install Linux

Question

I want to install Octopress in my computer. I try to do it like

Octopress document.

When I run

bundle install

Answer 1

For Ubuntu 14.04 simply do this:

sudo apt-get install ruby1.9.3

Should work for 13.10 and 13.04 too. (Not tested)