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Install
------------------
sudo apt-get install curl ca-certificates gnupg && curl https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -

sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ bionic-pgdg main" > /etc/apt/sources.list.d/pgdg.list'

sudo apt update && sudo apt-get install postgresql-12


Create a new user

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nginit@smehsan:~/wip/rails$ rails new myapp -d postgresql
      create  
      create  README.md
      create  Rakefile
      create  .ruby-version
      create  config.ru
      create  .gitignore
      create  .gitattributes
      create  Gemfile
         run  git init from "."