Namespaces

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Linux kernel feature that isolates system resources for groups of processes. Each namespace type provides a separate view: PID (process IDs), network (network stack), mount (filesystem mounts), user (user/group IDs), UTS (hostname), and IPC. Namespaces are the foundation of container isolation.

Key Properties

• PID Namespace
• Network Namespace
• Mount Namespace
• User Namespace

Related

• cgroups (resource limits — the other pillar of containers)
• Docker (uses namespaces for container isolation)

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operating-systems linux containers