Deep, hands-on Linux server administration (the traditional, "old-school" kind) : operating, securing, and troubleshooting manually managed production servers (LAMP/LEMP, system services, cron, networking, SSH) directly at the command line, not only through a cloud console. We expect this person to use AI to accelerate discovery, documentation, runbooks, log review, scripting, and infrastructure-as-code drafting, while applying strict human judgment around security, secrets, production access, destructive commands, rollback, and correctness.