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How to Use Linux Namespaces for User Isolation
In this episode of Linux Server Admin, Lucas and Luna dive into Linux namespaces for user isolation — a key technique for securing multi-tenant servers and containers. They explain how user namespaces map unprivileged UIDs to root inside a container, preventing container breakouts. Lucas walks through a practical example: creating a user namespace with unshare, mapping UIDs, and running a shell as 'root' inside the namespace without real privileges. They discuss real-world use cases like running legacy applications or multi-user development environments without risking the host. The episode…
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