// Topic catalog
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
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
Larger themes that make it easier to start reading and quicker to understand where to go next.
Topic 01
VPS, Linux, web stack, migrations, hosting, databases, and core operations.
Typical tasks
2026-09-22
After the move to Hugo the site turned from a heavy, constantly crashing thing into a light and fast static archive — and it became clear this wouldn’t be the end of it. If the …
2026-09-22
I have a project that I treat with particular care. Fifteen years ago I built a news portal for a small town — a typical regional site that ran reliably for several years, …
2026-09-22
Yocto Project — an open project that helps build custom Linux systems for embedded devices, regardless of CPU architecture. It is not a distribution, but a set of tools and …
// Next step
If this topic already looks close to your task, you can discuss it right away or open the service page.
Topic 02
MikroTik, VPN, routing, DNS, BGP, connectivity, and access troubleshooting.
Typical tasks
2026-09-25
HTTP (HyperText Transfer Protocol) — an application-layer protocol by which a browser, mobile app, or script requests a resource from a server and receives a response. A resource …
2026-09-22
RouterOS 7.22 was released on March 9, 2026. The main changes: Apps on top of containers, a built-in reverse proxy, notable BGP improvements and RA guard protection in the bridge. …
2026-09-22
pfSense — a firewall and router on FreeBSD, one of the oldest open projects in this area. It is developed by Netgate, and today it exists in two editions: the open pfSense CE …
// Next step
If this topic already looks close to your task, you can discuss it right away or open the service page.
Topic 03
Docker, CI/CD, releases, monitoring, observability, and incident handling.
Typical tasks
2026-09-22
I occasionally catch myself thinking “what if someone has already done this?” — after I’ve just written another piece of code. With confgraph, my AI secretary for …
2026-09-22
A container isolates an application from the host, but the isolation is not absolute: all containers share one kernel. A vulnerability in the image, a process running as root, or …
2026-09-22
A secret is any data that grants access to a resource: a database password, a payment system or cloud API key, a bot token, a private SSH key. If such a secret ends up in Git, …
// Next step
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Topic 04
SSL, hardening, access control, service protection, and secure configurations.
Typical tasks
2026-09-22
A container isolates an application from the host, but the isolation is not absolute: all containers share one kernel. A vulnerability in the image, a process running as root, or …
2026-09-22
Most of the code in a modern application was not written by you. The framework, the database driver, libraries for logging, JSON parsing and image processing — all of this is …
2026-09-22
An experienced developer finds vulnerabilities in someone else’s code by familiar signs: user data goes straight into an SQL query, a password is compared with plain ==, a …
// Next step
If this topic already looks close to your task, you can discuss it right away or open the service page.
Topic 05
Bots, integrations, internal services, process automation, and workflows.
Typical tasks
2026-09-22
I occasionally catch myself thinking “what if someone has already done this?” — after I’ve just written another piece of code. With confgraph, my AI secretary for …
2026-09-22
After the move to Hugo the site turned from a heavy, constantly crashing thing into a light and fast static archive — and it became clear this wouldn’t be the end of it. If the …
2026-09-22
It is commonly assumed that an engineer’s work begins where the code appears. In practice it’s the opposite: the most expensive part of the work happens before the …
// Next step
If this topic already looks close to your task, you can discuss it right away or open the service page.
Topic 06
When a site is down, everything is slow, or you need to quickly understand what broke.
Typical tasks
2026-09-22
Server metrics and logs don’t show everything. If an error occurred in the user’s browser or in a rare code path, the server may not log anything and the user may …
2026-09-22
Lab and field data Lighthouse and WebPageTest measure site speed in controlled conditions: one device, one network, one run. This is convenient during development, but real …
2026-09-22
KVM (Kernel-based Virtual Machine) — a virtualization subsystem built into the Linux kernel since version 2.6.20. It uses CPU hardware virtualization support (Intel VT-x, AMD-V) …
// Next step
If this topic already looks close to your task, you can discuss it right away or open the service page.
// More than articles
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