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A Cloud Guru

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

Level

Intermediate

Duration

15m

Published

Mar 20, 2020

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 postgresql.org:

$ sudo yum -y install https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm

Install PostgreSQL 12:

$ sudo yum install -y postgresql12-server postgresql12-contrib

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

Challenge

Connect as the Default User
- Change to the postgres user and launch psql:
```
$ sudo su - postgres
$ psql
```

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.