Exploring Linux‑Based Operating Systems Powering the IoT Landscape

RTLinux

RTLinux (Real‑Time Linux) is a real‑time operating system built by modifying the Linux kernel. It was originally created by V. Yodaiken at the New Mexico Institute of Mining and Technology and later acquired by Wind River.

Developers keep the original kernel code and add real‑time extensions, assigning the highest priority to real‑time tasks while running standard Linux tasks at lower priority, thus preserving compatibility.

Brillo

Brillo is Google’s IoT‑focused operating system derived from Android. It streamlines Android’s lower layers, inherits full support for Bluetooth, Wi‑Fi and other connectivity features, and offers low power consumption with strong security, allowing device manufacturers to adopt it directly.

uClinux

uClinux (micro‑controller Linux) targets embedded systems that lack a Memory Management Unit (MMU). Developed by Lineo, it is an open‑source exemplar of embedded Linux. Because the hardware has no MMU, multitasking requires special techniques.

Ostro Linux

Ostro™OS is a Linux distribution optimized for connected and embedded devices. It supports Bluetooth, NFC, Wi‑Fi, and standards such as IoTivity for device‑to‑device interoperability, offering pre‑configured sensors and over‑the‑air update capabilities.

LiteOS

In May 2015, Huawei introduced Agile Network 3.0, which includes the ultra‑lightweight IoT operating system LiteOS. Its kernel is only about 10 KB, enabling deployment on highly constrained devices.

OpenWrt

OpenWrt is a lightweight Linux‑based operating system widely used as the foundation for many smart router firmware images. Numerous derivative and branch versions exist, extending its functionality for various embedded networking scenarios.

Tizen

Tizen is an embedded operating system heavily backed by Samsung, powering devices such as smart watches (e.g., Gear S3), televisions, and some cameras.

Snappy Ubuntu Core

Snappy Ubuntu Core is Ubuntu’s vision for smart devices, offering a platform that can run software stored locally or fetched from the cloud, aiming to keep Linux at the core of intelligent, scalable IoT solutions.

Summary

The ecosystem of Linux‑based operating systems for IoT is vast and fragmented. Which distribution will dominate depends on future IoT application trends, specific use‑cases, and the level of community and commercial support. Nonetheless, Linux continues to play a crucial role in the mobile‑internet era.