GNU/Linux Ubuntu 20.04 Installing PostgreSQL 17 – Step by step Guide
The Tutorial Shows You Step-by-Step How to Install PostgreSQL 17 Database on Ubuntu 20.04 Focal LTS GNU/Linux desktop/server.
And PostgreSQL 17 for Ubuntu 20.04 is a Powerful, Open Source Object-Relational Database System with a proven Architecture knows for its strong Reliability, Data Integrity, and Correctness.
It’s trusted by developers worldwide for building robust, scalable, and high-performance applications, making PostgreSQL 17 on Ubuntu 20.04 an ideal choice for modern database-driven projects.
Furthermore, PostgreSQL 17 is a Major Release that contains several substantial Changes and Improvements.
Especially relevant: a dump/restore using pg_dumpall or use of pg_upgrade or logical replication is required for those wishing to migrate Data from any previous Release.

1. Terminal Getting Started Guide
How to Quick Start with Command Line on Ubuntu GNU/Linux:
Contents