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Nov 24, 2021 · Fundamentals

Understanding eBPF: A Beginner’s Guide to Linux’s In‑Kernel Virtual Machine

This article introduces eBPF as a register‑based virtual machine inside the Linux kernel, explains its non‑Turing‑complete design, shows how programs are loaded, verified, and attached to events, and provides a complete C example that counts TCP, UDP, and ICMP packets on a loopback interface.