ufw app list
ufw allow ssh
ufw enable
ufw status

apt install nodejs
apt install npm
curl -sL https://deb.nodesource.com/setup_10.x -o nodesource_setup.sh
bash nodesource_setup.sh
apt-get install -y nodejs
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
apt update
apt install yarn

apt update
apt install autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm5 libgdbm-dev
apt install git
logout # as ubuntu
git clone https://github.com/rbenv/rbenv.git ~/.rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(rbenv init -)"' >> ~/.bashrc
source ~/.bashrc
type rbenv
git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
git clone https://github.com/andorchen/rbenv-china-mirror.git "$(rbenv root)"/plugins/rbenv-china-mirror
rbenv install -l

rbenv install 2.6.5
rbenv global 2.6.5
echo "gem: --no-document" > ~/.gemrc
gem install bundler
gem install rails
rbenv rehash

apt-get install postgresql
apt-get install postgresql-server-dev-all
sudo su - postgres
createuser ubuntu --pwprompt
psql
ALTER ROLE ubuntu LOGIN;
CREATE DATABASE cam_price_prod WITH ENCODING='UTF8' OWNER=ubuntu;

apt-get install nginx

ssh-keygen
sudo mkdir /var/www
cd /var/www
sudo mkdir cam_price
sudo chown ubuntu:ubuntu cam_price/