A PostgreSQL read-only user that returns permission denied almost always has one of three missing grants: CONNECT on the database, USAGE on the schema, or SELECT on the tables. All three are required — missing any one of them blocks access completely. This guide fixes it with copy-paste commands verified on PostgreSQL 16. The Challenge: Read more about PostgreSQL Read-Only User: Complete Permission Setup Guide[…]
Last Updated: December 10, 2025Tested On: RHEL 9.3, PostgreSQL 16.1 PostgreSQL 16 is the stable release of the powerful open-source relational database system, offering enhanced performance, security, and new features. This comprehensive guide walks you through installing PostgreSQL 16 on RHEL 9 with step-by-step instructions, commands, and best practices. Why Upgrade to PostgreSQL 16 on Read more about Install PostgreSQL 16 on RHEL 9 [Tested dnf Steps][…]
Why Enable Timing in PSQL? When optimizing your SQL queries, it’s crucial to measure their execution time to understand their performance. Enabling timing in psql lets you see how long a query takes to execute. Why Turn Off the Pager? By default, psql uses a pager (like less) to display query results when the output Read more about Enable psql Timing and Disable Pager Permanently[…]
This guide covers how to install PostgreSQL 16 on Ubuntu 22.04 LTS using the official PGDG repository — the same method used in production environments. Commands are verified on Ubuntu 22.04 (Jammy). The original 2021 post covered Ubuntu 18.04 + PostgreSQL 11, both now EOL. Environment note: Commands below are verified on Ubuntu 22.04 LTS Read more about Install PostgreSQL 16 on Ubuntu 22.04: Step-by-Step[…]