Unikernel
A unikernel is a specialized, single-address-space machine image constructed by using library operating systems. It includes only the minimal set of libraries and drivers needed to run a specific application, resulting in a lightweight, secure, and fast executable. This approach eliminates the traditional general-purpose operating system kernel, reducing attack surfaces and resource overhead.
Developers should learn unikernels for deploying microservices, IoT devices, or cloud-native applications where security, performance, and minimal footprint are critical. They are ideal for use cases like serverless computing, edge computing, and high-performance networking, as they boot quickly and consume fewer resources compared to full virtual machines or containers.