LinuxKit is a toolkit for building custom minimal, immutable Linux distributions with secure defaults. The platform enables the creation of reproducible builds specifically designed for running clustered applications such as Docker or Kubernetes. The toolkit operates in a completely stateless manner while supporting persistent storage attachment when needed. LinuxKit distributions are managed through external tooling including Infrakit or deploykit for orchestration and deployment. The platform focuses on creating lightweight, security-hardened Linux environments that can be customized for specific use cases. These minimal distributions are designed to reduce attack surface while maintaining the necessary functionality for containerized workloads. LinuxKit supports immutable infrastructure patterns, where the operating system layer remains unchanged during runtime. This approach enhances security by preventing unauthorized modifications to the base system while ensuring consistent deployment across environments.