Articles in Linux | UserComp.com

Is It Safe to Forward Random Ports to a Nextcloud Server with a Specific MAC Address?

Learn about the risks of forwarding random ports to a Nextcloud server with a specific MAC address.

Checking if an Element Exists Inside an Array in Different Arrays using Bash

In this tech support article, we will explain how to check if an element exists inside an array in different arrays using Bash scripting. We will provide an example using two arrays and compare their elements to find a match.

Preserving Client IP Addresses when Connecting to Game Servers via WireGuard VPN Tunnel on a VPS

Learn how to preserve client IP addresses when connecting to game servers through a WireGuard VPN tunnel on a VPS. This article provides a solution for OpenVPN users looking for a similar functionality.

Setting up SSL Certification for a NAS Media Server Inside CGNAT with DNS Access

A NAS (Network Attached Storage) media server running an interface app without security measures can be vulnerable. Learn how to set up SSL certification for a NAS media server inside CGNAT using DNS access.

TCP Server Not Sending ACK Response for PSH, ACK Packets in C++ Linux

While implementing a TCP server socket in C++ on a Linux machine, connected to another device for high-rate data streaming (800Hz), we encountered an issue where the server was not sending ACK responses for PSH and ACK packets. In this article, we will discuss the possible causes and solutions for this issue.

L2 WiFi-to-Ethernet Bridge: Drops Internet Connection on Ubuntu Server 23.10

This article explains how to troubleshoot and resolve issues with L2 WiFi-to-Ethernet Bridge connections dropping on Ubuntu Server 23.10.

Font Size Issue with xterms after Upgrading to a 1920x1080 Monitor

After upgrading to a new laptop with a 1920x1080 monitor, some xterms have become smaller and illegible. This article explores potential solutions to this issue.

Sharing btrfs home across Arch-based systems with LVM on LUKS setup

Learn how to share a btrfs home partition across multiple Arch-based systems using LVM on LUKS setup.

Root Folder: LS Command Gets Stuck

A user reports that the 'ls' command gets stuck when run from the root folder. However, it runs correctly for common users and their parent folders. Learn how to resolve this issue.

Systemd Service Not Loaded: Troubleshooting Debian 8 Yocto

This article discusses a common issue with Systemd services not loading on Debian 8 Yocto machines. The article covers checking the status of the app.service and the symlink in /etc/systemd/system/multi-user.target.wants. It also provides potential solutions to resolve the issue.

Linux Breaking NTFS Filesystems on Kubuntu 22.04 with Kernel 6.5.0-28

Users of Kubuntu 22.04 with kernel 6.5.0-28 have reported system stuttering issues since an unassisted update. Initially, they suspected RAM problems, but it appears the NTFS filesystem is being affected.

Bridge Mode: Configuring Docker, thingNAT, and VirtualBox for Host Communication

Learn how to configure Docker, thingNAT, and VirtualBox in Bridge Mode for seamless host communication. Improve your tech setup today.

Removing the Icon Taskbar in Desktop Panels: A Guide

Learn how to remove the icon taskbar in desktop panels for various Linux distributions. This guide covers GNOME, KDE, and XFCE desktops.

Proper Apache2 Server Configuration for Python-Django Websites on Ubuntu VPS

Learn how to properly configure Apache2 server for running Python-Django websites on Ubuntu VPS. This guide covers essential steps to ensure smooth functioning.

Define Network Settings Inside Ubuntu Virtual Machine in VirtualBox

Learn how to define network settings inside a Ubuntu virtual machine running in VirtualBox. This article provides a step-by-step guide to help you configure network settings and troubleshoot common issues.

Setting up FIREWALL with DIPSEC (StrongSwan) for Site-to-Site Connection: Making PING work on Debian 12

This article explains how to set up a FIREWALL with DIPSEC using StrongSwan for a site-to-site connection between three nodes: edgerouter#1 (10.41.1.0/24), edgerouter#2 (10.48.2.0/24), and a VMS Debian 12 server. We will configure firewalld and make PING work between the nodes.

Using Real Drive with Libvirt/QEMU: VM Shows 'QEMU HARDDISK' instead of HDD in Task Manager

This article explains how to use a real drive with Libvirt and QEMU on a Windows 11 VM while resolving the issue where the Task Manager shows 'QEMU HARDDISK' instead of the actual HDD name.

Switching to Linux: Troubleshooting Dual Boot Issues and Removing Windows

Learn how to troubleshoot Linux dual boot issues and remove Windows to ensure a smooth Linux installation. Follow this step-by-step guide for a successful switch.

Building and Running C++ Code in WSL2 (Linux Debian) with Mingw - Not Always the Last One Running

Learn how to build and run C++ code in the Windows Subsystem for Linux (WSL2) using Mingw. This guide covers the setup process and troubleshooting common issues.

Adjusting PHP-FPM Performance with System Resources (Number of CPU Cores Mostly) on a Fairly Weak Server

This article discusses how to optimize PHP-FPM performance on a fairly weak server by adjusting the number of CPU cores. Learn how to improve system resources allocation and enhance your website's performance.

Error during apt-get update: Signature verification failed (screen recording)

This article provides solutions to an error encountered during the apt-get update process on Ubuntu systems where signature verification fails. The error message displayed is 'W: GPG error: http://in.archive.ubuntu.com/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4097BB3211F92394....' This article offers troubleshooting steps to resolve the issue and get your system back to normal.

Mingw Linux Doesn't Always Build Executable (Windows)

Learn how to resolve the issue where Mingw Linux fails to build an executable on Windows using x86_64-w64-mingw32-g++ in a Makefile.

Installing MariaDB Hangs: Ensuring Completion on Ubuntu MATE 20.04

Experiencing installation issues with MariaDB on Ubuntu MATE 20.04? Learn how to troubleshoot and complete the installation process.

Setting up IPSEC (StrongSwan) Site-to-Site for PING to Work between Debian 12, Edgerouter #1, and Edgerouter #2

Learn how to set up IPSEC (StrongSwan) Site-to-Site for PING to work between a Debian 12 system and two Edgerouter devices (10.41.1.0/24 and 10.48.2.0/24).

Systemd Service Not Loaded in Yocto: A Solution for Debian Machines

In this tech support article, we will discuss a common issue with Systemd services not being loaded in Yocto for Debian machines. We'll explore a solution that involves symlinking the service file to the multi-user.target.wants directory.

Ubuntu 24.04 LTS: SSH Password Authentication Not Working Despite Configuration Changes

Users report an issue where SSH Password Authentication is not working on Ubuntu 24.04 LTS despite configuration changes. This article explains possible causes and solutions.

Setting up Nginx: Conf File Not Picking Alphabetic Order for URLs that Don't Match Requests

This article explains how to resolve an issue where the Nginx configuration file is not respecting the alphabetic order for URLs that don't match requests.

Creating Ctags Files for Java SDK Libraries in Vim: A Step-by-Step Guide

In this tech support article, we'll guide you through the process of creating Ctags files for Java SDK libraries used inside Vim. We'll refer to the system-libraries Java and add some instructions on how to create the CTAGs files.

Ubuntu 22.04: 3-Second Login Screen Turns After NVIDIA Driver Update (nvidia-driver-555)

Users report experiencing a 3-second login screen delay after updating NVIDIA drivers to version 555 on Ubuntu 22.04. This issue can be resolved by disabling the 'sleep-shake' mouse feature.

Using Proxmox Services Without Logging: Is It Possible?

Learn about the possibility of using Proxmox services without logging, focusing on non-keyboard display and reboot-free environments.

Using xinitrc to Execute Bash Commands: A Language Switch Example

In this tech support article, we'll walk you through the process of using xinitrc to execute Bash commands for a language switch example. Specifically, we'll demonstrate how to use setxkbmap to switch keyboard layouts and toggle option groups every time a log-in command is executed.

Removing Every Nth Frame in Raw Video Using FFmpeg

Learn how to remove every Nth frame in raw video files using FFmpeg. This process is useful when dealing with digitally converted films that have been duplicated at regular intervals.

Setting Default Selected Menu Item in Midnight Commander

Learn how to set the default selected menu item in Midnight Commander for tagged files using the UserMenu (F2) in various desktop environments like Kate and KDE Plasma.

Setting up IPSEC (StrongSwan) Site-to-Site on Debian 12: Making PING Work

Learn how to set up IPSEC Site-to-Site connections using StrongSwan on Debian 12 and make PING work between nodes.

Resetting Read-Only Flag on Partitions in External USB Drives

Learn how to reset the read-only flag on partitions in external USB drives using various methods for different operating systems such as Linux, Windows, and MacOS.

Error: NO SigTag Received - Authentication in Firehose Operation

This article explains the causes and solutions for the 'NO SigTag Received - Authentication' error encountered during Firehose operation.

Connecting Internet via Cellphone on Debian 12

Learn how to set up an Internet connection using a cellphone on Debian 12. This step-by-step guide covers essential tools and configurations for seamless connectivity.

Incorrect Battery Status Wake Issue on ThinkPad X1 Extreme Gen2 with Dual Boot System (Linux and Windows 11)

Users of the ThinkPad X1 Extreme Gen2 with a dual boot system (OpenSUSE Tumbleweed/Slowroll and Windows 11) have reported an issue with the incorrect battery status wake since around February. Although Windows functions perfectly, the Linux side experiences problems.

Emulating PowerShell Keyboard Text Selection in WSL and Windows Terminal

Learn how to emulate PowerShell keyboard text selection in WSL and Windows Terminal for a better user experience.

Resizing File Systems with Many Block Group Descriptors for Linux Ableton Push 3 Standalone

Learn how to resize file systems with many block group descriptors for Linux Ableton Push 3 Standalone. This guide covers cloning larger drives with up to 35 partitions.

RSync Unable to Write MTP Device (Motorola Stylus 5G 2023): A Solution

Learn how to resolve the RSync unable to write MTP device issue on Motorola Stylus 5G 2023.

Androidx86-64 bit ISO: Blank Screen at Grub Menu

This article provides a solution for users who encounter a blank screen issue at the Grub menu when installing Androidx86 using a 64-bit ISO file.

Blocking Attacking IPs Behind a Webserver

A service page hosted behind an Oracle server has been under attack from specific IP addresses. The Apache logs show the attacking IPs as 201.17.83.xxx and 10.0.1.xxx. In this article, we discuss how to block these malicious IPs to secure your webserver.

Installing K3s, Cilium, and Alpine 3.20 on a Virtual Machine