intermediate~4h
Linux and Networking Interview Deep Dive: Reasoning Through Real Scenarios
The Linux and networking questions every DevOps interview circles back to -- finding what's eating disk space, debugging a service that won't start, explaining TCP versus UDP in a way that connects to real design decisions, and tracing DNS resolution end to end.
Learning objectives
- Apply a systematic narrowing process to find what's consuming disk space on a server
- Debug a failing systemd service using the correct sequence of commands
- Explain the TCP vs UDP tradeoff in terms of a concrete design decision, not just a feature list
- Trace a DNS resolution from a client's stub resolver through to an authoritative answer
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Linux and Networking Interview Deep Dive: Reasoning Through Real Scenarios