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Installing PostgreSQL on CentOS

PostgreSQL is the world's most advanced open source database. Its stability, functionality, and extensibility make it a primary choice for an RDBMS solution. In this hands-on lab scenario you are the DBA for Awesome Company. You have been tasked with building a PostgreSQL database backend to facilitate the development of a new web application. This will help you become familiar with how to install the software, initialize the database, and make an initial connection as the administrative user.

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Path Info

Clock icon Intermediate
Clock icon 15m
Clock icon Mar 20, 2020

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Table of Contents

  1. Challenge

    Install the PostgreSQL Software

    • Open the distribution .repo file in vi:
      $ sudo vi /etc/yum.repos.d/CentOS-Base.repo
    • Exclude PostgreSQL by appending the following line to both the [base] and [updates] sections:
      $ exclude=postgresql*
    • Download and install the PGDG file from
      $ sudo yum -y install
    • Install PostgreSQL 12:
      $ sudo yum install -y postgresql12-server postgresql12-contrib
  2. Challenge

    Initialize the Database

    • Initialize the database:
      $ sudo /usr/pgsql-12/bin/postgresql-12-setup initdb
    • Start and enable the postgresql-12 service:
      $ sudo systemctl start postgresql-12
      $ sudo systemctl enable postgresql-12
  3. Challenge

    Connect as the Default User

    • Change to the postgres user and launch psql:
      $ sudo su - postgres
      $ psql

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