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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) and turns the Linux kernel into a …
Read more2026-05-30
BGP is usually associated with carrier equipment and Linux servers, but in small distributed networks it is useful even on an office router: neighboring sites automatically learn about new subnets, and when a tunnel …
Read more2026-03-27
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 more2025-12-25
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 more2025-10-23
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: …
Read more2025-09-22
Getting a new VPS is just the beginning. By default, the server is insecure and not ready for production use. This checklist will help you step by step to prepare your VPS: close security holes, enable updates, and …
Read more2025-09-03
Swap is virtual memory on disk that saves your VPS from crashing when RAM runs out. On low-cost servers, it’s an indispensable tool to avoid failures during short-term memory usage spikes. Setup is simple: create a file, …
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