brew install rbenv ruby-build
echo 'if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi' >> ~/.bash_profile
source ~/.bash_profile
rbenv install 2.5.1
rbenv global 2.5.1
ruby -v
# open new terminal
gem install jekyll bundler
bundle install

brew update && brew upgrade
brew doctor
brew uninstall --force ruby
brew install ruby
# close and reopen terminal

sudo chown -R $(whoami) /usr/local/lib/ruby/*
sudo chown -R $(whoami) /Library/Ruby/Gems/2.0.0
brew link ruby

make server