Free, practical guides for IT and security people — the ports you keep forgetting, the subnet math you do at 2am, the compliance checklist nobody wrote down. Plus printable packs and deployable AI employee kits for when you'd rather ship than fiddle.
The ports that actually come up — in the exam, in the interview, and at 2am when something's down.
What a small company actually has to do — in plain English, ordered by what stops the most damage first.
The full CIDR table, plus the block-size trick for finding network, broadcast, and range in your head.
The questions that actually get asked, with real answers — and what the interviewer is really testing.
Why most AI agents fail, and the four-part structure — scope, SOPs, escalation, done — that holds up in production.
Grouped by task — files, logs, processes, disk, network — with the flags that matter and the one that bites.
Run it, debug it, and reclaim the disk space Docker quietly eats. Plus the Compose commands you use daily.
Daily commands, branching, and a full undo table — uncommit, unstage, and recover work you thought was gone.
The router settings that actually matter, smart-device isolation, and the ten-minute version that fixes most of it.
Which cert actually opens doors, what a homelab should prove, and the honest timeline nobody gives you.
Protect your accounts in an afternoon — in priority order, because the first two items do most of the work.
Scope it, split it in half, change one thing. The method that works on problems you've never seen.
Prompts that save real time — errors, scripts, configs, incident notes — plus the guardrails that matter.
What to learn first, how to ask questions that look like competence, and the mistakes that define new techs.