Lubuntu

Lubuntu is a lightweight Linux distribution and an official flavor of the Ubuntu operating system. It is designed to run well on older hardware and on devices with limited resources. Lubuntu uses the LXQt desktop environment (since 2018), providing a modern, efficient interface built with the Qt toolkit. Prior to this, Lubuntu used LXDE.

Development and release: Lubuntu began as a lightweight alternative within the Ubuntu family to deliver a fast and energy-efficient desktop. It is maintained by the Lubuntu Project and a community of contributors and follows the Ubuntu release cycle. New Lubuntu releases align with Ubuntu versions and receive security updates and bug fixes through the Ubuntu infrastructure. Long-term support (LTS) releases are offered on select versions.

Performance and features: The LXQt environment emphasizes low memory and CPU usage, prioritizing speed and energy efficiency, and it uses PCManFM-Qt as its file manager. Lubuntu includes core Ubuntu components and software from the Ubuntu repositories, offering a functional desktop with lightweight applications and a simple, easy-to-use interface suitable for machines with limited resources.

Hardware and usage: Lubuntu is commonly recommended for desktops, laptops, and embedded devices with limited RAM or older processors. It remains a practical option for users who want an Ubuntu-based system that is responsive on low-spec hardware while retaining access to the wide Ubuntu software ecosystem.