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#sysadmin

Explore technical articles, benchmarks, and architectural blueprints categorized under #sysadmin on Tekromancy.

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3 dispatches

Sep 15, 2026 #sysadmin

The Production bpftrace Playbook: Real-Time Linux Kernel Performance One-Liners

Battle-tested bpftrace recipes and one-liners for diagnosing CPU latency, block I/O bottlenecks, network drops, memory leaks, and process executions in production.

by Joshua Edward McLaughlin Cox Read →

Sep 3, 2026 #sysadmin

The Hardened Linux Bastion: Kernel Sysctls, SSH Certificates & AppArmor

A comprehensive, battle-tested operational checklist for hardening production Linux servers against modern automated adversary campaigns.

by Joshua Edward McLaughlin Cox Read →

Sep 1, 2026 #sysadmin

Architecting a Global Overlay Mesh with WireGuard and Anycast BGP

Designing an ultra-low-latency encrypted multi-region mesh network using Bird, WireGuard, and Linux network namespaces.

by Joshua Edward McLaughlin Cox Read →

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