---
title: docker
id: docker
date: 2018-04-12
full_link: /docs/reference/kubectl/docker-cli-to-kubectl/
short_description: >
  Docker is a software technology providing operating-system-level virtualization also known as containers.

aka: 
tags:
- fundamental
---
 Docker is a software technology providing operating-system-level virtualization also known as containers.

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Docker uses the resource isolation features of the Linux kernel such as cgroups and kernel namespaces, and a union-capable file system such as OverlayFS and others to allow independent "containers" to run within a single Linux instance, avoiding the overhead of starting and maintaining virtual machines (VMs).