Articles in Linux | UserComp.com

Configure WireGuard OpenWRT Server and Client

This article guides you through the process of setting up a WireGuard VPN server on an OpenWRT router. We'll walk you through the necessary steps to ensure a secure and private connection.

Couldn't add watermark (using scale 2 ref) while performing hardware transcoding with FFMPEG

This article discusses a problem encountered while trying to add a watermark to a video using FFMPEG's hardware transcoding feature. The issue seems to be related to the scale 2 ref option. This article provides a solution to this problem.

Shutting Down Computers Based on Accessed IP Address

This article provides ideas and suggestions for implementing ways to shut down Windows, Linux, or MacOS computers based on IP addresses accessed via a browser. This can be useful for managing network resources or securing a network.

Passing boot args to kernel in QEMU without append

Learn how to pass boot arguments to the kernel when using QEMU without the append option. This guide covers the process for Linux users.

Adjust Vagrantfile for chosen Wi-Fi automatically

This article will guide you on how to automatically adjust your Vagrantfile to connect to a chosen Wi-Fi network. Let's get started!

Understanding Negative Caching in DNS (RFC-1034/4.3.4)

Learn about Negative Caching in the context of DNS (Domain Name System) according to RFC-1034/4.3.4. This article explains the method a name server may use to add SOA RR (Start of Authority Resource Record) additions to response.

Natural Readers Online Causes Chrome/Chromium Crash on Windows - Works Fine on Firefox on HP ZBook Studio G4 Laptop

Users have reported that the Natural Readers online service causes Chrome/Chromium to crash on Windows, but it works fine on Firefox on HP ZBook Studio G4 laptops. This article provides a solution to the issue.

Programmatic Way: Differentiating Self-Extracting Archives

Learn a programmatic approach to distinguish Self-Extracting Archives (SEA) from normal executables using tools like WinZip, WinRAR, and 7zip.

Unexpected Text Conversion in Calc Formulas

While working with complex formulas in Calc, a formula suddenly started converting text unexpectedly. Trying various things seemed to help, but the formula is still not quite right. Here's a possible solution.

Safe Fallback System for External Diff Tool

Learn how to establish a safe fallback system for an external diff tool that isn't installed. This guide will wrap the call to the external diff tool script in a check to ensure it's available.

Running PostgreSQL as a Certain Linux User with Local UNIX Socket

This article explains how to run PostgreSQL as a specific Linux user with a local UNIX socket. Follow the steps to set up PostgreSQL with SSH and a UNIX socket for a more secure and efficient database.

Troubleshooting X-Forwarding Failure in Ubuntu for New Users: XAUTHORITY and DISPLAY Explained

Having trouble with X-forwarding on your new Ubuntu user account? Learn about the roles of DISPLAY and XAUTHORITY and how they can help you resolve any issues.

Intercepting Traffic on Windows with VMPlayer and Proxifier

Learn how to intercept traffic on a Windows system using VMPlayer and Proxifier. This guide will show you how to set up Proxifier to intercept requests according to specific rules and pass them through the VPN.

Programmatic Way to Differentiate Self-Extracting Archives from Normal Archives

Learn how to programmatically differentiate self-extracting archives from normal archives using various tools such as WinZip, WinRAR, and 7zip. This guide will help you identify the type of archive with ease.

Possible to Encode BMPVVC to MP4 using FFmpeg? Here's How for 8K 60fps

Learn how to encode BMPVVC video to MP4 format using FFmpeg with 8K resolution and 60fps. Improve your video encoding skills and get the best out of your video files. Read more for detailed instructions.

MySQL: Using Symbolic Links for Databases on Linux

This article explains how to use symbolic links to manage MySQL databases on a Linux system. It includes steps for creating and using symbolic links, as well as best practices for maintaining the database structure.

Checking HTTPS Port Without wget/curl/ncbarealpinesystem

This article explains how to check if a website is available using the curl command and inspect the HTTPS port without requiring wget or ncbaRealpineSystem.

Disk Part List Displays Disks Numbered [0, 2, 3], Not [0, 1, 2] in DiskPart

This article discusses an issue where DiskPart lists disks in an unexpected order, displaying disks numbered [0, 2, 3] instead of [0, 1, 2]. This can occur when inserting two storage devices (USB hard disk or flash disk), with the first inserted USB storage becoming disk ordered as number 2, not ordered as disk 1.

Troubleshooting Home Server: Suddenly Unreachable Over Internet

Having trouble accessing your home server and its services, such as Nextcloud or Navidrome, over the internet? This article covers potential causes and steps to troubleshoot a home server that suddenly became unreachable, focusing on configurations behind an Nginx reverse proxy.

Enforcing File Icon Preview Mode

Learn how to ensure the file preview mode remains enabled for specific file types, preventing them from changing to their default format. This article covers steps for Linux, Windows, and MacOS.

Vulnerability Report: Insecure JDK Version in K3s Cluster

This report highlights a potential vulnerability in the JDK version of a K3s cluster. The concerned pod path and vulnerable binary have been identified.

How to Create NFSv4 ACL Permissions File on Server and Client

This article explains how to create NFSv4 ACL permissions file on both the server and client. It demonstrates the use of the `nfs4_setfacl` command to grant read, write, and execute permissions to a specific user on a file named 'test'.

Setting Firefox to Open Long Previously Opened Windows

Learn how to set Firefox to open long previously opened windows. This article provides a step-by-step guide for Firefox users on Windows, Linux, and MacOS.

How to Connect AWUS036ACH 5GHz Band to Ubuntu Server

Learn how to connect your AWUS036ACH 5GHz band WiFi adapter to your Ubuntu Server using RTL8812AU drivers. Follow our step-by-step guide for a successful connection.

Configure i3-wm lock screen to allow user switching

Learn how to configure i3-wm lock screen to allow user switching on a Linux Mint 22 Cinnamon system with i3 lock.

RHEL 9.5 EC2 Instance RDP Connection Fails: Quick Fix

Learn how to resolve RDP connection issues on your RHEL 9.5 EC2 instance with our step-by-step guide. Enabling EPEL and installing XRDP and TigerVNC Server can quickly fix this problem.

Cropping Images with ImageMagick: Not Cropping Pictures as Expected?

Learn how to crop images using ImageMagick, a powerful tool for image manipulation. However, if you're not getting the expected results, this article will help you troubleshoot and fix the issue.

Always Pretty-print JSON URLs in Google Chrome

Learn how to enable a convenient option in Google Chrome that formats URLs returning JSON. This feature is good but can be quite annoying when refreshing or clicking...

Cropping Images with ImageMagick: Slide Example

Learn how to crop images using ImageMagick. This tutorial demonstrates the process with a Slide example. We'll show you how to create a cropped copy of an image using the command line.

Understanding Android Debugging on Rooted Devices

This article provides a guide on Android debugging on rooted devices. We will discuss the common issues encountered during the process and provide solutions to overcome them. Whether you are using Windows, Linux, or MacOS, this guide will help you understand and troubleshoot Android debugging on rooted devices.

Google Chromecache Disappeared Without Deleting: A Guide

This article provides a guide on what to do when Google Chromecache disappears without deleting. We'll discuss solutions for Windows, Linux, and MacOS.

Understanding curl: Way to write current time and output info

This article explains how to use curl to make web service calls with Transfer-Encoding: chunked responses and get raw chunks with --raw and --no-buffer options.

Formatting and Wiping a BitLocker Encrypted Hard Drive Running Tails OS USB Key

This article provides a guide on how to completely format and wipe a hard drive encrypted with BitLocker, while running the Tails OS USB key. The purpose is to securely delete all data without the need for data recovery.

How to Set a Static IP Address that Changes Daily on Server zx86.org

Learn how to set a static IP address that changes daily on your server at zx86.org. This guide covers the basics of network interface configuration in Linux and can help you avoid the hassle of manual IP changes. Make sure to secure your server and optimize your website with Cloudflare tunnel hosting. Read more for detailed steps.

Firefox: Disabling Extensions vs Safe Mode for Loading Search Results

This article provides solutions for a library website not loading search results in Firefox, even with extensions disabled. It discusses the use of Safe Mode to temporarily disable all extensions for troubleshooting purposes.

Resolving Type Mismatch Error When Creating 2D Array

This article explains how to resolve the Type Mismatch Error when creating a 2D array in JavaScript. It provides a step-by-step guide and suggests best practices for creating 2D arrays.

Understanding Dynamic Lock Screen: A Comprehensive Guide

Dynamic Lock Screen is a feature that allows users to display changing wallpapers on their lock screens. This article provides a comprehensive guide on how to set up and use Dynamic Lock Screen on various platforms.

Slow Internet on Ubuntu 24.04 LTS on Lenovo IdeaPad 5

Experiencing slow internet speeds on a brand new Lenovo IdeaPad 5 running Ubuntu 24.04 LTS, even though devices at home load websites much faster (e.g., mobile TV).

Speed Up OpenVPN on pfSense Firewall for Dedicated Cloud Server

Learn how to optimize OpenVPN performance on a pfSense firewall (2.7.2-RELEASE) running on a dedicated cloud server with 16GB RAM. This guide will walk you through the process of improving internet access for the server and connecting a laptop through the firewall. Follow these steps to improve your OpenVPN experience on pfSense.

Setting up a Linux Wireless Access Point for Sharing Wi-Fi

Learn how to set up a Linux Wireless Access Point to share your Wi-Fi connection with USB Wi-Fi devices that can't receive SSID or have a bad adapter.

Best Practices for Training SpamAssassin in Continuous Operation

Learn how to train SpamAssassin for continuous operation, using a script that calls sa-learn every time a user moves an email to their Spam folder in Dovecot IMAP. This guide provides best practices for effective spam filtering.

User-specific SpamAssassin database in Dovecot

Learn how to use SpamAssassin with Dovecot to classify spam and move it to a specific folder for each user. Dovecot will train SpamAssassin based on the user's email.

Resolving DDNS Name Server Pointing Issue

This article provides solutions to a common issue faced while setting up DDNS on a NAS, where the sub-domain login, password verification, and domain verification fail. We'll discuss possible reasons and steps to resolve the DDNS Name Server Pointing Issue.

Tmux Configurations: Mouse Support Disabled Sometimes

Learn how to enable mouse support in Tmux configurations and troubleshoot potential issues. Tmux usually allows mouse support with the proper configuration, but sometimes it may disable it. Follow these steps to ensure mouse support is always enabled.

Emulating Intra-Drive Behavior of File Explorer using user obcopy (another tool) exactly

This article explains how to emulate the intra-drive behavior of File Explorer using user obcopy (another tool) across drives. It provides a log for following the steps exactly.

Fix PostgreSQL collation issue related to system configuration on RedHat Enterprise Linux 9

This article provides a solution for a PostgreSQL collation issue encountered while creating a database with the Canadian en_CA.UTF-8 collation on a RedHat Enterprise Linux 9 server.

How to Set Up a Wireless Access Point in Kali Linux

This article provides a step-by-step guide on how to set up a wireless access point in Kali Linux. Learn how to configure your network interfaces, create a new access point, and secure your wireless network. If you're a Linux user looking to expand your network capabilities, this article is for you. Read more on our tech support site.

Converting Rec.709 Time-Lapse Images using FFmpeg

Learn how to convert time-lapse images from Rec.709 color space using FFmpeg. This guide will provide a step-by-step process for both Linux, Windows, and MacOS users.

Host Multiple Websites Behind One IP Port 80

Learn how to host multiple websites behind one IP port 80 on various operating systems like Linux, Windows, and MacOS. This article provides a step-by-step guide to setting up a reverse proxy, virtual hosting, and load balancing for your domains.

Can't Change Home Directory on TrueNAS: A Helpful Guide

Having trouble changing the home directory on TrueNAS? Our tech support site can help! This guide will walk you through the process of configuring a user's home directory on TrueNAS. Learn about the common issue where the $HOME variable is not configured and how to solve it. Follow our step-by-step instructions to update your user's home directory in TrueNAS today.