Setup Simple Ruby on Rails App On Ubuntu 16.04 From Scratch

Rails is one of the most popular ruby framework out there. And now, I want to try to run the simple app on Ubuntu 16.04 machine. it’s for testing purpose.

First, update the system and install essential dependencies:

$ sudo apt-get update
$ sudo apt-get build-essential curl sudo vim

Install nodejs:

$ curl -sL https://deb.nodesource.com/setup_9.x | sudo -E bash -
$ apt-get install nodejs

Create a dedicated user for the app, for example, ubuntu user. And this also make the ubuntu user with sudo privilege and run the command without password. Which is useful to run command that needs sudo privilege in the next steps.

$ useradd ubuntu -m
$ echo 'ubuntu ALL=(root) NOPASSWD: ALL' >> /etc/sudoers

swith to ubuntu user and install GPG keys for install rvm:

$ su - ubuntu
ubuntu~$ gpg --keyserver hkp://keys.gnupg.net \ --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 \ 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

Download and install rvm:

ubuntu~$ \curl -sSL https://get.rvm.io | bash -s stable

Install ruby interpreter with version 2.5.1, you might wanna change it with your preferable version:

ubuntu~$ source ~/.rvm/scripts/rvm
ubuntu~$ rvm install 2.5.1
ubuntu~$ rvm use 2.5.1 --default

Install rails with gem, and create new app without writing the Gemfile. Why? because everytime I create new app, I ended up facing errors with dependencies in Gemfile. So, it safe to setup new app without the Gemfile, we’ll create it manually later.

ubuntu~$ gem install rails
ubuntu~$ rails new app --skip-gemfile

Create the Gemfile:

ubuntu~$ touch ~/app/Gemfile
ubuntu~$ vim ~/app/Gemfile

Gemfile, fill these dependencies below into the file, save and exit:

source 'https://rubygems.org'
gem 'rails', '~> 5.2.1'
gem 'bootsnap', '~> 1.3.2'
gem 'tzinfo-data', '~> 1.2018.5'
gem 'listen', '~> 3.1.5'
gem 'sqlite3'

Now, install all the gems with bundle:

ubuntu~$ cd ~/app
ubuntu app~$ bundle install

Try run the rails:

ubuntu app~$ rails server -b 0.0.0.0