PostgreSQL on RHEL9 Version: We have three PostgreSQL versions available:PostgreSQL 14 (Long-Term Support),PostgreSQL 16 (Current Stable Release),PostgreSQL 17 (Latest Version) How to use: To manage PostgreSQL services, use these systemctl commands: systemctl start/stop/status/restart postgresql-[version] For example: systemctl status postgresql-16 To access the database: First switch to the postgres user with: su - postgres Then connect using: psql Required Port: tcp:5432 (default PostgreSQL port) All versions are actively maintained and include regular security updates. PostgreSQL 14 is recommended for production environments requiring long-term stability, while PostgreSQL 17 offers the latest features and optimizations.