Category: Ubuntu

A practical Ubuntu administration reference covering frequently used commands, configuration files, package management, services, networking, storage, and troubleshooting checks.

Learn how to list installed Deb packages on Ubuntu with apt and dpkg-query, verify package status and versions, identify file ownership, and separate manual from automatic installations. The guide also covers inventory exports and Snap packages.

Learn how Ubuntu LTS support progresses from five years of standard security maintenance to ten years with Ubuntu Pro ESM and up to fifteen years with the Legacy add-on. The guide also lists lifecycle dates and shows how to check a system's coverage.