PostgreSQL 15 Ubuntu 18.04 Installation – Step-by-step

Installing

2. 2. Setting Up PostgreSQL 15 Repo

   How to Add PostgreSQL 15 Linux Ubuntu Apt Repository

   PostgreSQL 15 Apt Repo Setup

   PostgreSQL 15 Apt Repository

3. 3. Installing PostgreSQL 15

   Then to Install PostgreSQL 15 for Ubuntu
   Especially relevant: in case you have a previous PostgreSQL Setup on System you may need first of Removing it.
   Simply play:

   sudo apt install postgresql-15 postgresql-client-15

   In case of a libpq5 Version issue, then first Remove any existing PostgresSQL Installation or provide to: Download & Install Manually the Library.
   Again to Search for other gears:

   sudo apt search postgresql-15