// Topic collection
26 entries for this tag
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2026-03-27
In 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 more2026-03-26
In 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 more2026-03-04
TTL (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 more2025-12-30
When 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 more2025-12-25
Jitsi 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 …
Read more2025-11-28
If I were sent to a deserted digital island and allowed to take only one networking utility — I would unhesitatingly choose Netcat. The official documentation (man nc) dryly states: “a utility for reading from and …
Read more2025-11-04
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 Require a 10-year support lifecycle Want a …
Read more2025-11-01
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 OpenWRT OpenWRT turns an ordinary router …
Read more2025-10-29
This guide will show how to configure two Linux servers so that all the Internet traffic from a specific local subnet (for example, 10.100.10.0/24) is routed not via its default gateway but through an IPIP tunnel to a …
Read more2025-10-23
Hello! If you’re new to the world of remote server administration, you’re probably familiar with SSH — a reliable tool for connecting to remote machines. But what do you do when the connection is unstable: …
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