Comprehensive Guide to Installing PostgreSQL on CentOS 7 Using Yum

PostgreSQL is a powerful open-source relational database management system, and CentOS 7 provides a stable and secure environment for hosting it. This comprehensive guide will walk you through the process of installing PostgreSQL on CentOS 7 using the Yum package manager, covering key steps such as 'CentOS PostgreSQL', 'install PostgreSQL CentOS 7', 'yum install PostgreSQL', and 'CentOS install PostgreSQL.'

Step One: Update Yum Repository

Before installing PostgreSQL, it's good practice to update the Yum repository to ensure you are fetching the latest packages. Open the terminal and execute:

This command fetches the latest information about available packages.

sudo yum update

Step Two: Install PostgreSQL

Now, use the following command to install PostgreSQL:

This will install the PostgreSQL server and additional contributed modules.

sudo yum install postgresql-server postgresql-contrib

Step Three: Initialize the Database

After installation, initialize the PostgreSQL database and enable automatic start on system boot:

sudo postgresql-setup initdb
sudo systemctl enable postgresql

Step Four: Start PostgreSQL Service

Start the PostgreSQL service using the following command:

sudo systemctl start postgresql

Verify that the service is running without errors:

sudo systemctl status postgresql

Step Five: Access PostgreSQL Shell

Access the PostgreSQL shell using the psql command:

Now, you are in the PostgreSQL interactive shell, and you can start creating databases, users, and performing other administrative tasks.

sudo -u postgres psql

Additional Tips

Secure Your PostgreSQL Installation

Edit the PostgreSQL configuration file to enhance security:

Adjust access controls according to your security requirements.

sudo nano /var/lib/pgsql/data/pg_hba.conf

Firewall Configuration

If your firewall is enabled, allow PostgreSQL traffic:

sudo firewall-cmd --add-service=postgresql --permanent
sudo firewall-cmd --reload

Conclusion for PostgreSQL on CentOS 7

Congratulations! You've successfully installed PostgreSQL on CentOS 7 using Yum. This provides you with a robust and efficient relational database system, ready for your applications. Remember to tailor security settings based on your specific requirements. This guide ensures a smooth installation process, making PostgreSQL on CentOS 7 easily accessible for your database needs.

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