sudo apt remove jekyll
sudo apt autoremove
sudo gem uninstall jekyll bundler
sudo uninstall ruby-full build-essential zlib1g-dev
sudo apt remove ruby-full build-essential zlib1g-dev
sudo gem install jekyll bundler
sudo apt remove jekyll
sudo apt autoremove
sudo gem uninstall jekyll bundler
sudo uninstall ruby-full build-essential zlib1g-dev
sudo apt remove ruby-full build-essential zlib1g-dev
sudo gem install jekyll bundler