I explain how the infrastructure you use every day actually works.
Videos and articles on networking, servers, virtualization and security. No hype, no marketing: what actually happens when you hit Enter.
FEATURED VIDEO
READ THE ARTICLE →How DNS works: the map of the system
Why your browser can't connect to a name, how DNS is split across a distributed hierarchy where every level delegates to the one below, and who the four actors behind every lookup are.
Read the full articleWHAT I COVER
12 areas · one at a time, from zeroNetworking
From the cable to name resolution: what happens between your machine and the server on the other side.
Virtualization
Proxmox VE and VMware: clusters, high availability and migrations we have actually done.
Windows Server / AD
Domains, GPOs, WSUS, IIS and the failures that break a Monday morning.
Linux
Services, permissions, logs and systemd with no mysticism and no blindly copied commands.
Backup and recovery
The 3-2-1 rule, Proxmox Backup Server and the only test that counts: restoring.
Security
Perimeter, endpoint, the vulnerabilities that really hit a small company, and the human factor.
Cloud
Azure and AWS explained for people coming from on-premise who do not want to lose control.
Scripting and automation
PowerShell and Bash, to stop doing by hand what the machine does better.
Docker and containers
Images, volumes and networks from scratch, and when a container is not the answer.
Monitoring
Which metrics matter, which alert wakes you at 3 a.m. and which noise you can switch off.
Hardware and homelab
Building a lab at home to practise without breaking anything in production.
IT career
What to study, in what order, which certification is worth it and what the market asks for today.
- Proxmox VE
- hypervisor
- Proxmox Backup Server
- backup
- Windows Server
- WSUS · IIS · AD
- Sophos
- perimeter · endpoint
- Microsoft 365
- productivity
- LAN · WAN networks
- IBM servers
~400 nodes · +100 clients
ABOUT ME
I lead the Systems and AI team at Grupo Audinfor: close to 400 servers in production for more than 100 active clients.
I have spent years solving in production the problems that courses cover in two lines. I am starting this channel because almost everything written about systems is written for people who already know it: I want to explain it the way I would have liked it explained to me.
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