This tutorial demonstrates how to install Odoo 18 on Ubuntu 26.04. Odoo is a comprehensive open-source ERP solution that combines essential business applications into a single platform, including accounting, CRM, sales, inventory, eCommerce, manufacturing, and more. Its modular framework allows businesses to deploy only the features they require while remaining flexible enough to accommodate future growth. Odoo also offers extensive customization, centralized data management, multiple deployment options, and an intuitive user interface. Since Odoo uses PostgreSQL as its database backend, this guide also covers PostgreSQL installation and basic configuration.