安装jekykll
最好在你的git bash下安装，据说在DOS命令下错误百出。安装过程如下：
$ gem install jekyll
Fetching: liquid-2.5.5.gem (100%) Successfully installed liquid-2.5.5 Fetching: fast-stemmer-1.0.2.gem (100%) ERROR: Error installing jekyll: The 'fast-stemmer' native gem requires installed build tools. Please update your PATH to include build tools or download the DevKit from 'http://rubyinstaller.org/downloads' and follow the instructions at 'http://github.com/oneclick/rubyinstaller/wiki/Development-Kit'还是报错了，提示我们下载安装"DevKit"，这里下载安装即可，然后又提示我们在http://github.com/oneclick/rubyinstaller/wiki/Development-Kit找答案。
上面提示说：
安装了DevKit后切换到DevKit的安装目录：cd<devkit_install_dir>
执行 ruby dk.rb init 生成config.yml配置文件
最后 ruby dk.rb install 安装 DevKit 到你ruby中。对于64位操作系统来说，可能会报错：‘Invalid configuration. Please fix ‘config.yml’ and rerun ‘ruby dk.rb install’`. 解决方案是将ruby目录的绝对路径写在config.yml中，如下：
# This configuration file contains the absolute path locations of all # installed Rubies to be enhanced to work with the DevKit. This config # file is generated by the 'ruby dk.rb init' step and may be modified # before running the 'ruby dk.rb install' step. To include any installed # Rubies that were not automagically discovered, simply add a line below # the triple hyphens with the absolute path to the Ruby root directory. # # Example: # # --- # - C:/ruby19trunk # - C:/ruby192dev # --- - C:\Ruby200-x64注意规则：在---下，以 - 开头，然后空一格，然后是写ruby的绝对路径。
然后再试 ruby dk.rb install.如下提示：
$ ruby dk.rb install
[INFO] Updating convenience notice gem override for 'C:/Ruby200-x64' [INFO] Installing 'C:/Ruby200-x64/lib/ruby/site_ruby/devkit.rb'那么就说明安装成功了，然后就安装jekyll吧
$ gem install jekyll
Temporarily enhancing PATH to include DevKit..
Building native extensions. This could take a Successfully installed fast-stemmer-1.0.2 Fetching: classifier-1.3.4.gem (100%) Successfully installed classifier-1.3.4 Fetching: rb-fsevent-0.9.4.gem (100%) ......检测是否安装成功：
$ jekyll -v jekyll 1.4.3提示ok了！