build_rails.sh

sudo apt install autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm5 libgdbm-dev
git clone git://github.com/sstephenson/rbenv.git ~/.rbenv
mkdir -p ~/.rbenv/plugins
git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
source ~/.bash_profile

git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
rbenv install -l
rbenv install 2.5.1
rbenv global 2.5.1
ruby -v
echo "gem: --no-document" > ~/.gemrc
gem install bundler
gem env home
gem install rails
rbenv rehash
rails -v
cd ~/.rbenv
git pull