Install PostgreSQL on AWS EC2 Linux: A Step-by-Step Guide

Understanding how to effectively install PostgreSQL on AWS EC2 Linux is a critical skill for database management in the cloud. AWS EC2 provides secure, resizable compute capacity, while PostgreSQL offers an advanced open-source database system. Mastering the installation process is the first step towards leveraging these powerful tools.

Pre-requisites for Installing PostgreSQL on AWS EC2 Linux

Before we dive into the steps, it’s essential to understand the prerequisites:

• Understanding of AWS EC2: AWS EC2 offers resizable compute capacity in the Amazon Web Services cloud. Familiarize yourself with its key features and functionality.
• Knowledge of Linux Commands: Basic proficiency with the Linux command line will be crucial for installing and configuring PostgreSQL.
• Basics of PostgreSQL: Understanding the core concepts of PostgreSQL helps in the efficient management of databases post-installation.

Understanding AWS EC2 Linux and PostgreSQL

Amazon EC2 Linux instances provide a robust and scalable environment for deploying applications. Coupled with PostgreSQL, an open-source object-relational database system, it forms a powerful combination for managing and storing data on the cloud. PostgreSQL offers key advantages like data integrity, extensibility, and a high degree of SQL compliance. Thus, understanding both AWS EC2 Linux and PostgreSQL is fundamental before proceeding with the installation.

Step-by-step Guide to Installing PostgreSQL on AWS EC2 Linux

Here, we’ll guide you through the process of setting up PostgreSQL on AWS EC2 Linux:

Step 1: Setting up AWS EC2 Linux Instance

Create and configure your instance in the AWS Management Console. Make sure you have the necessary security groups and SSH access.

Step 2: Updating System Packages

Log in to your instance via SSH, then update system packages with the command:

sudo yum update -y 

Step 3: Installing PostgreSQL

Install PostgreSQL using the command:

sudo amazon-linux-extras install postgresql10 

Step 4: Initializing PostgreSQL Database:

Initialize the PostgreSQL database:

sudo service postgresql initdb 

Step 5: Adjusting PostgreSQL Settings for Security:

Edit pg_hba.conf file to modify client authentication. Change settings from ident to md5.

Step 6: Starting and Enabling PostgreSQL Service:

Start the PostgreSQL service using the and enable it to start at boot:

sudo service postgresql start 
sudo chkconfig postgresql

Troubleshooting Common Installation Errors

Encountering issues during installation is common. Here are solutions to frequent problems:

• Error Message: postgresql: unrecognized service: This may occur if PostgreSQL isn’t installed correctly. Revisit the installation steps.
• Error Message: pg_hba.conf not found: Ensure the file path is correct and PostgreSQL service has been initialized.

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