VIKHOST Tech Blog
Useful Technical Articles, Notes and Instructions.
Ubuntu Server 26.04 Released

Ubuntu Server 26.04 Released: What’s New for VPS and Production Infrastructure

Ubuntu Server 26.04 Released: What’s New for VPS and Production Infrastructure
Ubuntu Server 26.04 LTS is out, and for administrators this is not just another line in the release calendar. A new LTS version usually becomes the base image for thousands of servers, VPS templates, cloud instances, internal tools, and production workloads for years ahead.
The release looks important for hosting environments because it touches the parts that actually matter …

/ Linux
RDP Authentication Error Has Occurred on Windows VPS

RDP Authentication Error Has Occurred on Windows VPS

RDP Authentication Error Has Occurred on Windows VPS
The message “An authentication error has occurred” appears immediately after the connection attempt begins, before credentials are validated and before a desktop session is created.
In the RDP connection flow, TCP establishes the transport channel first. Once that succeeds, the client and server move to security negotiation, where encryption protocol, CredSSP handshake, and Network Level Authentication are agreed upon. If this negotiation …

/ Windows
Linux VPS Slow Disk IO_ How to Diagnose and Fix

Linux VPS Slow Disk I/O: Why Your Server Is Slow When CPU Looks Fine

Linux VPS Slow Disk I/O: Why Your Server Is Slow When CPU Looks Fine
A Linux VPS can feel unresponsive even when CPU usage appears normal and memory consumption looks stable. SSH pauses for a moment before accepting input, API calls stretch beyond expected latency, and routine package updates seem to hesitate for no obvious reason. Monitoring panels show idle processors and no dramatic spikes.
This is where troubleshooting often …

/ Linux
Linux VPS Running Out of Memory Swap, OOM Killer, and What to Do

Linux VPS Running Out of Memory: Swap, OOM Killer, and What to Do

Linux VPS Running Out of Memory: Swap, OOM Killer
When a Linux VPS runs out of memory, the problem rarely announces itself clearly. Services may start responding more slowly, background jobs can lag behind schedule, and some processes disappear without any obvious error message. In many cases the system still accepts connections and reports normal CPU usage, which makes the situation especially confusing.
When a Linux VPS starts running out …

/ Linux
Linux VPS Freezes with Low CPU Usage

Fix Linux VPS Freezes Caused by High Load Average

Why Linux VPS Freezes When CPU Usage Is Low
A Linux VPS can appear alive but behave as if it is frozen. SSH sessions hang, services stop responding, commands take seconds to return, and the only thing that seems to help is a reboot.
At the same time, monitoring often shows something confusing. CPU usage is low, there are no obvious spikes, yet the server feels slow or completely unresponsive …

/ Linux
How to Fix “No Space Left on Device” on Linux

How to Fix Disk Space Issues on Linux VPS (df no space left on device)

How to Fix Disk Space Issues on Linux VPS
The No space left on deviceБ error on Linux usually appears when you least expect it. A service may refuse to start, log files stop updating, package installations fail, or the system can’t create new files.
In most cases, the first reaction is to run df -h, see a filesystem at 100%, and start deleting files as quickly as possible. Sometimes …

/ Linux
Docker Disk Space Issues on VPS_ Where Your Space Really Goes

Docker Disk Space Issues on VPS and Why Disk Usage Grows So Fast

Docker Disk Space Issues on VPS and Why Disk Usage Grows So Fast
One of the most common surprises after working with Docker on a VPS is how quickly disk space disappears.
You may not deploy many containers, logs look reasonable, and df -h still shows free space — yet Docker suddenly refuses to pull a new image with a familiar error: no space left on device.
These Docker …

/ Linux
How to Fix Kernel Security Check Failure on Windows VPS

Fixing “Kernel Security Check Failure” on Windows VPS: What Causes It and How to Recover Quickly

Fixing “Kernel Security Check Failure” on Windows VPS: What Causes It and How to Recover Quickly
A Windows VPS can run smoothly for months. Updates install without issues, RDP works as expected, and everything behaves predictably. Then one day a blue screen appears — Kernel Security Check Failure, a stop code that says nothing about what actually went wrong.
This error occurs on regular desktop PCs as well, but on …

/ Windows
How to use a VPN on your RDP without disconnecting

How to use a VPN on your RDP without disconnecting

How to use a VPN on your RDP without disconnecting
Many users face the same frustrating issue. You install a VPN on your Windows server, enable it, and your RDP connection drops instantly. Nothing is wrong with the server. The problem is simple: most VPN clients reroute all traffic through their tunnel. When this happens, Windows treats the RDP session as just another outbound stream and pushes it into the …

/ Windows
Searching Text in Linux Files

Searching Text in Linux Files with grep, find, and xargs

Searching Text in Linux Files with grep, find, and xargs
Searching through Linux files is something everyone who works with servers eventually deals with. A few directories can be navigated manually, but once the number of logs, configs, or project files grows, simple scrolling becomes pointless. Commands like grep, find, and xargs turn the mess into something manageable, even pleasant.
If you’re running the commands on a server environment, especially …

/ Linux