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← Theory library
Observability & Firmware theory
Packet dissection, Prometheus/OTel, eBPF/XDP, and embedded Linux/U-Boot.
Practise in the Code Lab →
Easy
1. Network Packet Capture: Wireshark & tcpdump
Promiscuous mode, BPF filters, and PCAP dissection.
Medium
2. Prometheus, Metrics & OpenTelemetry
The 3 pillars of observability: Metrics, Logs, and Distributed Tracing.
Hard
3. eBPF (Extended Berkeley Packet Filter) & XDP
High-speed programmable kernel packet processing and tracing.
4. Embedded Systems & Firmware Architecture
Bootloaders (U-Boot), Linux OpenWrt, RTOS, and hardware buses.
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