2025-11-04
Yocto Project: assemble your own Linux like LEGO bricks
Yocto — this is not a distribution. It’s a tool from which you build your Linux. Like Lego, only for engineers. 🔧 Who needs Yocto Developing medical or industrial devices …
// Topic catalog
Catalog of articles and breakdowns
Articles on infrastructure, networking, DevOps, security, and automation. If you need help with the task, not just another article, this page gives you a fast route into the work areas.
// What brought you here
Fast entry by task
A site or service keeps going down
Breakdowns of failures, errors, slowdowns, and unstable behavior.
You need a server or infrastructure
VPS, Linux, web stack, migrations, hosting, and core operations.
Network, VPN, or MikroTik problems
Routing, access, DNS, VPN, and network incidents.
You need deployment and stable operations
Docker, CI/CD, releases, monitoring, and observability.
You need to automate routine work
Python, integrations, bots, workflows, and internal services.
// Topics
Main material areas
Larger themes that make it easier to start reading and quicker to understand where to go next.
Topic 01
Servers and infrastructure
VPS, Linux, web stack, migrations, hosting, databases, and core operations.
Typical tasks
- Move a site or service to a new server
- Set up Linux, Nginx, databases, and backups
- Figure out why the system behaves unstably
42 articles
2025-11-01
OpenWRT: turning an old router into a powerhouse
Imagine: an old router for 2000 ₽ blocks ads, shares a VPN, works as a Mesh system and doesn’t slow down even with 50 devices. This is not magic — this is OpenWRT. 🏠 Who needs …
2025-10-30
PgBouncer, Pgpool-II and others: A proxy for PostgreSQL 🐘
A PostgreSQL proxy or connection pooler is an intermediary application that sits between your client applications and one or more PostgreSQL servers. It speaks the PostgreSQL …
// Next step
If this topic already looks close to your task, you can discuss it right away or open the service page.
Topic 02
Networking and routing
MikroTik, VPN, routing, DNS, BGP, connectivity, and access troubleshooting.
Typical tasks
- Set up VPN and secure access to office or cloud
- Fix routing, DNS, or unstable connectivity
- Configure MikroTik, firewall, and external links
29 articles
2026-03-25
RouterOS 7.22: Apps, Reverse Proxy, and BGP updates
MikroTik released a new RouterOS 7.22. In short: the developers decided to turn regular containers into a more user-friendly “Apps” ecosystem, added a native Reverse …
2025-11-03
pfSense: a legend proven over decades
pfSense — a tank in the world of firewalls. Is updated less often, but runs for years without surprises. 🏢 Who pfSense is for Corporation with 100+ users Needs official support Has …
2025-11-02
OPNsense: the firewall of the future that newbies install
OPNsense — it’s like pfSense, but prettier, faster, and with an API. Want an office firewall you wouldn’t be embarrassed to show your boss? Here it is. 💼 Who OPNsense …
// Next step
If this topic already looks close to your task, you can discuss it right away or open the service page.
Topic 03
Deploy and reliability
Docker, CI/CD, releases, monitoring, observability, and incident handling.
Typical tasks
- Set up deployment without manual chaos
- Add monitoring, alerts, and baseline observability
- Investigate incidents and stabilize production
41 articles
2026-01-19
Container security — how to avoid introducing a 'Trojan horse' into your cloud
When Docker first appeared, it was loved for the slogan: “Build once, run anywhere”. Developers stopped hearing the phrase “it works on my machine, but not on the server.” But …
2026-01-13
Secrets in code — how to avoid giving hackers the keys to your server
Imagine this scenario: you’ve been working on a cool project all night. By 4 a.m. everything is ready, you do a final git push and go to sleep with a clear conscience. In the …
2026-01-12
The Perfect Dockerfile: Turning a Hobbyist Build into a Professional Tool
Write a Dockerfile simply: FROM node, COPY ., CMD run. It works, and for local tests this is often enough. But when such an image reaches CI/CD or, God forbid, production, problems …
// Next step
If this topic already looks close to your task, you can discuss it right away or open the service page.
Topic 04
Security and protection
SSL, hardening, access control, service protection, and secure configurations.
Typical tasks
- Set up SSL, certificates, and secure connections
- Restrict access and close unnecessary entry points
- Harden server and service configuration
37 articles
2026-01-19
Container security — how to avoid introducing a 'Trojan horse' into your cloud
When Docker first appeared, it was loved for the slogan: “Build once, run anywhere”. Developers stopped hearing the phrase “it works on my machine, but not on the server.” But …
2026-01-17
SCA — testing 'third-party' code for vulnerabilities
Imagine you are building a house. You designed the walls yourself, checked every brick, and made sure you didn’t leave the keys in the lock. But what if the concrete you …
2026-01-15
SAST — how to find vulnerabilities in code before hackers do
Have you ever wondered how experienced programmers find bugs in someone else’s code just by looking at it? They look for patterns. They know that if user data goes straight into an …
// Next step
If this topic already looks close to your task, you can discuss it right away or open the service page.
Topic 05
Python and automation
Bots, integrations, internal services, process automation, and workflows.
Typical tasks
- Build a bot, integration, or internal tool
- Remove manual routine with Python and APIs
- Connect services and automate the full workflow
13 articles
2025-11-20
How to catch errors in production: setting up monitoring in 15 minutes
You deployed a new feature. Everything works perfectly on your local machine, and you’re happy with the result. Then a message appears: “Nothing works for me.” …
2025-11-18
Guardrails in n8n: a new level of security for LLM automation
If you use n8n for automations involving large language models (LLM), you probably know not only about their huge capabilities but also about the risks. LLMs remain a “black …
2025-10-31
Light vs. Heavy Workers in n8n: How They Work and Why They're Needed
n8n is a powerful open-source workflow automation tool that allows building complex workflows without deep programming. One of the key scaling mechanisms in n8n is queue mode, …
// Next step
If this topic already looks close to your task, you can discuss it right away or open the service page.
Topic 06
Troubleshooting and recovery
When a site is down, everything is slow, or you need to quickly understand what broke.
Typical tasks
- Find the cause of a site or service outage
- Understand why the system is slow or returning errors
- Recover service quickly after a failure
6 articles
2025-11-20
How to catch errors in production: setting up monitoring in 15 minutes
You deployed a new feature. Everything works perfectly on your local machine, and you’re happy with the result. Then a message appears: “Nothing works for me.” …
2025-11-19
CrUX Vis: how Google shows what your users actually feel
Introduction: why “lab” metrics aren’t everything “Lighthouse shows 100/100, but users complain about lag” — a familiar pain? Synthetic tests …
2025-08-08
076 | KVM: Powerful Virtualization for Linux
What is KVM? KVM (Kernel-based Virtual Machine) is a virtualization technology built directly into the Linux kernel. KVM transforms the Linux kernel into a Type 1 hypervisor …
// Next step
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// More than articles
If you need help, not just another article
If you already understand your task, you do not have to keep reading. You can go straight to the homepage or the service pages and choose the next step there.