// DevOps
Practical materials about infrastructure, networking, migrations, releases, and real problems solved in production.
58 DevOps materials published
Imagine: an ethical hacker finds an exposed .env file or a critical vulnerability on your server. They don’t want to hack you — they want to help. They go to the site, look for contacts and… hit a wall. The …
Read moreIn real infrastructure, access to GitHub is not always direct. Somewhere outgoing 22/tcp is blocked, somewhere HTTPS is unstable, DPI is in place, or the corporate network allows outbound only through an intermediate …
Read moreIn production this is a routine situation: you increased the disk at the hypervisor level (VPS, cloud or Proxmox VE), but inside Ubuntu nothing changed — the / partition is still 100% full. Let’s go through how to …
Read moreAre you tired of entering passwords or tokens for every git pull and git push? Do you copy your SSH key to every server and worry it might be stolen or “stuck” in logs? In this article we’ll look at …
Read moreTTL (Time To Live) — is an eight-bit field in the IP header that defines the maximum number of “hops” (nodes) a packet can traverse before being discarded. Each time it passes through any router the TTL value …
Read moreIf you still run next build directly on the production server — your server is really suffering. CPU pegged, OOM-kill, 502 errors and long downtimes — this is a classic that needs to end. In 2026 the industry standard is …
Read moreWhen a project moves beyond local development and starts using CI/CD, a fundamental question arises: how to securely pass configuration parameters into build and deployment pipelines. This concerns not only database …
Read moreOpenVPN is a reliable and time-tested VPN protocol that allows organizing secure remote access to a local network. MikroTik RouterOS supports OpenVPN in server mode starting from version 6.x (TCP), and from version 7+ — …
Read moreWhen working on real projects (CDN change, migration, refactor) you often need to bulk-replace one URL with another. At first glance the task seems trivial: sed -i 's|old|new|g' **/* — and done. In reality that approach …
Read moreJitsi Meet works out of the box very well for video conferencing. The Jitsi Meet + Jibri bundle allows you to record meetings — and many installations stop there. But as soon as Jitsi is used not occasionally, but as …
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