Setting up ruby on rails on Ubuntu 18.04

(1) Install prerequisites.

sudo apt update
sudo apt install autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm5 libgdbm-dev

(2) Setup rbenv.

git clone https://github.com/rbenv/rbenv.git ~/.rbenv

echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc

echo 'eval "$(rbenv init -)"' >> ~/.bashrc

source ~/.bashrc

git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build

(3) Build ruby.

rbenv install 2.6.3

(4) Set as global version and rehash.

rbenv global 2.6.3

rbenv rehash

(5) Install bundler

gem install bundler

(6) Install MySQL client

sudo apt install mysql-client libmysqlclient-dev

(7) Install Yarn / Node

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -

echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

sudo apt update && sudo apt install yarn