Operating system kernel
An operating system kernel is privileged core software that manages hardware and system resources while providing fundamental services to other software.
Kubernetes in Action, Second Edition
A kernel is the privileged core of an operating system that manages hardware resources and executes system-level operations.
- How it is used
- Explains how containers achieve isolation, start quickly, and depend on host hardware and operating-system capabilities.
- How deep it goes
- Explains system calls, CPU execution, isolation, kernel modules, and architecture compatibility without descending into kernel implementation internals.
- Examples
- Uses three-application comparisons, missing kernel modules, and x86-versus-ARM deployment scenarios.
- What you can do after
- Evaluate container portability by checking host kernel features, loaded modules, and hardware architecture.
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Rust in Action: Systems programming concepts and techniques
A kernel is the privileged core of an operating system that manages hardware resources and provides fundamental services for software execution.
- How it is used
- Serves as a minimal OS project for exploring hardware-facing Rust without an existing operating system.
- How deep it goes
- Works through a bootable kernel, custom target, and entry point, but stops short of implementing process or thread coordination.
- Examples
- Uses an x86-64 Rust kernel whose framebuffer write produces a colored box when booted in QEMU.
- What you can do after
- Build it from scratch as a minimal Rust kernel, package it with a bootloader, and run it in QEMU.
Related concepts
- containerused by · A software container is an isolated execution environment that packages an application and its dependencies while sharing the host operating system kernel.
- container securityaddressed by · Container security is the practice of protecting container images, runtimes, workloads, hosts, configurations, and supporting infrastructure from vulnerabilities, compromise, and unauthorized activity.
- privileged containerused by · A privileged container is a container granted broad host-level permissions or capabilities that substantially reduce its normal isolation from the host.
- cgroupincludes · A cgroup is a Linux kernel mechanism that groups processes to control, limit, isolate, and account for their resource usage.
- operating systempart of · An operating system is system software that manages computer hardware and provides services and interfaces for application programs.
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