Ubuntu Linux Distribution

Ubuntu is a free and open-source Linux distribution based on Debian, designed for everyday use on desktops, servers, and cloud environments with a strong focus on usability, regular release cycles, and enterprise support. Developed by Canonical (founded by Mark Shuttleworth in 2004, based in London), Ubuntu is the most widely used Linux distribution on desktops and in public clouds, powering over 30 percent of all AWS EC2 instances. Key features: LTS (Long Term Support) releases every two years in April with 5 years of free security and maintenance updates plus Extended Security Maintenance (ESM) up to 10-12 years via Ubuntu Pro. Interim releases every six months with 9 months of support. Desktop uses GNOME desktop (since 17.10) with customized Yaru theme, dock, and Ubuntu-specific extensions. Snap packages provide containerized application format with automatic updates, rollback, and cross-distribution compatibility via Snap Store. Server edition features cloud-init, automated security updates via unattended-upgrades, and minimal footprint for data center deployment. Official cloud images for AWS, Azure, GCP, and OpenStack are pre-configured with cloud-init and SSH. MAAS (Metal as a Service) provides bare-metal provisioning for server fleets. Juju offers application modeling for orchestrating complex multi-service deployments. Livepatch enables kernel security patching without rebooting via Ubuntu Advantage. Landscape provides systems management for large fleets with package updates, compliance monitoring, and remote scripting. Official flavors include Kubuntu (KDE Plasma), Xubuntu (Xfce), Lubuntu (LXQt), Ubuntu MATE, Ubuntu Budgie, and Ubuntu Studio for creative work.