Install

Install Ruby

sudo apt-get install ruby-full build-essential zlib1g-dev

Adding environment variables to ~/.bashrc

echo '# Install Ruby Gems to ~/gems' >> ~/.bashrc
echo 'export GEM_HOME="$HOME/gems"' >> ~/.bashrc
echo 'export PATH="$HOME/gems/bin:$PATH"' >> ~/.bashrc
source ~/.bashrc

Finally, install Jekyll and Bundler:

gem install jekyll bundler

Start local github service

cd ggangliu.github.io
jekyll serve --watch

Then, localhost:4000

How to create a subscribe form on Jekyll blog