Articles in Linux | UserComp.com

Sudo User: Flag Not Using Designated User

When attempting to use sudo with a flag to change user privileges, the command may fail if the designated user does not have the correct privileges. This article explains how to ensure the user has the necessary permissions to execute the command.

Understanding Multidimensional Expansion and Brace Expansion in Tech Support: A Bash Example with ImageMagick

In this tech support article, we'll explain the concepts of multidimensional expansion and brace expansion in Bash, using a concrete example with ImageMagick. Learn how to append multiple files to a command.

VSFTPD Status Failed: Inactive Error on Ubuntu 24

This article provides a solution for the VSFTPD inactive error issue on Ubuntu 24. Despite having the VSFTPD service installed, the system continues to receive inactive error messages and the service fails to reload.

Connecting to a RealVNC Server via Intermediate SSH Terminal

Learn how to connect to a RealVNC Server using an intermediate SSH terminal.

Troubleshooting Valid LosF config Directory Issue in SLURM HPC Cluster

This article provides solutions for beginners encountering the 'Valid LosF config directory not detected' error while trying to update SLURM resource management on an HPC cluster.

BTRFS: Failed to Destroy QGroup after Removing Subvolume

This article discusses an issue where attempting to destroy a QGroup in BTRFS after removing a subvolume results in a 'Device or resource busy' error. Possible solutions include waiting for the subvolume sync to complete or using the 'btrfs subvolume delete' command with the '--cleanup=snapshot' option.

Expect Script Inside Bash Remote SSH: Sudoers Replacement Tactics

This article explores the usage of Expect script inside Bash for remote SSH and provides insights on how to replace lines in /etc/sudoers without using sudo or inputting a password. Improve your tech support skills with this powerful combination.

Create a Writable Linux Installation Device for Later Use

Learn how to create a writable Linux installation device by making a bootable USB stick from a downloaded ISO image. This guide will help you prepare a Linux installation device for later use, making it easy to install Linux whenever you're ready.

NGINX Not Displaying Images: Troubleshooting for Firefox and Other Browsers

Learn how to troubleshoot NGINX not displaying images in Firefox and other browsers. This article covers certificate issues and other common causes.

KDE Plasma 5.27.11 on Debian 12: Sending Short Signals for USB Workstations Power Management Sleep Wake Events

This article explains how to configure KDE Plasma 5.27.11 on Debian 12 to send short signals for USB workstations power management sleep wake events.

Concatenate Multiple Video Cuts and Hardcode Embedded Subs with FFmpeg

Learn how to concatenate multiple video cuts and hardcode embedded subtitles into a single MP4 file using the powerful FFmpeg tool. This guide covers the basic command structure for cutting different parts of a video and merging them together, along with the process of hardcoding subtitles into the video. Improve your video editing skills and create a seamless viewing experience by following this FFmpeg tutorial.

Recovering Encrypted LUKS Partitions with Brute Force: Provide Disk Path

Learn how to recover encrypted LUKS partitions using brute force and remember password. Provide the disk path to get started.

Solaris 10 and Windows XP: Dual-Booting Issues with ZFS and GRUB 0.91

This article discusses the dual-booting issues encountered while installing Solaris 10 on a separate partition alongside Windows XP, focusing on the role of ZFS and GRUB 0.91.

How to Fix Firewall Reducing Maximum Download Speed on Celeron J1900 ARH Linux Router

Learn how to fix an issue with Firewall reducing the maximum download speed on a Celeron J1900 processor-based ARH Linux router. Follow the steps in this guide to optimize your network connection.

Solaris 10 and Windows XP: Solaris Partitions Not Booting with NTLDR Error

Learn how to troubleshoot and fix Solaris 10 partitions not booting with an NTLDR error when dual-booting with Windows XP.

Browsing Nextcloud Folder Structure using Dolphin Linux: Authentication Warning

This article provides a step-by-step guide on how to browse a Nextcloud folder structure using Dolphin Linux. We'll address the authentication warning issue that might occur and discuss potential solutions.

Automatically Configure DNS Server Routes for WSL2 Ubuntu on Windows with Twingate VPN

Learn how to automatically configure DNS server routes for WSL2 Ubuntu on Windows with Twingate VPN. This tutorial provides a step-by-step guide to help you get started and optimize your tech support experience.

Does Linux Terminal Emulators Support Wrapping Whitespace?

Users may wonder if Linux terminal emulators support wrapping whitespace, allowing long lines to wrap without breaking words. In this article, we'll explore this question and provide some examples.

Running X on Ubuntu 24.04 Solely with Integrated GPU

Learn how to run X on Ubuntu 24.04 exclusively with an integrated GPU using the xrandr command.

Network Manager (nmcli): Replacing the 'dropdhcplease' Command for Fedora 40 and Later

In Fedora 40 and later, the old 'dhclient' advice to drop DHCP leases no longer works. Instead, NetworkManager handles DHCP, and the GUI works well when installed. Here's how to use 'nmcli' to manage DHCP leases.

What Does 'cp -ruv --update Remove Files Destination?' Mean?

Exploring the behavior of the 'cp -ruv --update' command in Linux and its impact on file maintenance in the destination directory. Learn more about this command and how to use it effectively.

Navigating VPN: Differences in Connection Times on Linux and Windows

Learn the differences in VPN connection times between Linux and Windows operating systems. Understand how to optimize your VPN experience on each platform.

Installing Headers for Kali 6.1.0-kali5-arm64 on TP-Link Archer T2U Nano (Realtek RTL8811AU)

This article explains the process of installing headers for Kali 6.1.0-kali5-arm64 on a TP-Link Archer T2U Nano with Realtek RTL8811AU. Already installed drivers work fine with newer kernels, but headers are required for custom kernel builds.

How to Reset Windows 10 Subsystem for Ubuntu Password?

Learn how to reset your lost or unknown password for Ubuntu on Windows 10 Subsystem for Linux (WSL) with this easy-to-follow guide. Improve your tech support skills and provide solutions for WSL password headaches. Maximize the potential of your Windows 10 system and dual-boot seamlessly.

Searching Files in a C++ Project (located on QNX) for Given Class/Object/Void: MapABC

Learn how to search for a specific class, object or void function named 'MapABC' in a large C++ project located on QNX operating system. This article explains the steps to efficiently search through multiple header (.h) and source (.cpp) files using various search methods.

Customize Linux Sensors: 3 Outputs to Try on Ubuntu 24.04

This article provides three output customization options for Linux sensors, specifically for those running Ubuntu 24.04. Learn how to clean up and rename various devices using lmsensors and enhance your system's functionality.

Iwconfig not working on Linux for Redmi 12 Pro with Alfa AWUS036NH and rtl8812au chipset

New users encounter issues with Iwconfig not recognizing the Alfa AWUS036NH wifi adapter on their Redmi 12 Pro, despite the device being rooted and using the rtl8812au chipset.

Getting Ventoy v1.0.99 to Work with Secure Boot Turned On for Dual Boot (Ubuntu 22.04.4 LTS and Windows 10)

This article provides a solution to the issue of Ventoy v1.0.99 failing to work with Secure Boot turned on for creating a dual boot system with Ubuntu 22.04.4 LTS and Windows 10.

Moved Grubx64.efi Version Linux Live CD Boot to Ventoy EFI Partition on Another Flash Drive: A Tech Support Guide

In this tech support guide, we will discuss how to move the Grubx64.efi version of a Linux Live CD boot to the Ventoy EFI partition on another flash drive, overcoming verification issues. Read more to learn how to do it.

Setting Global Variable with Bash Function Output Piped to Another Command

Learn how to set a global variable in bash by piping the output of a function to another command. This technique is useful for assigning the output of a command or function to a variable in a bash script. In this example, we define a small bash function and demonstrate how to set the value of a global variable to the output of the function.

Understanding 'make apt-get dpkg commands run better (with -s mode)'

Learn how to optimize your 'apt-get' and 'dpkg' commands in Linux by using the -s mode for a smoother experience. This guide will help you understand the process and improve your package management skills.

Mikrotik Router: Troubleshooting OpenVPN Server Connection with 2 WAN Providers

Having trouble connecting a second provider through the OpenVPN Mikrotik server? Learn about common issues and solutions to get your Mikrotik router running smoothly with two WAN providers.

Fixing Black/Empty Frames at the Start of a Video using FFmpeg

Learn how to cut black or empty frames from the beginning of a video file using FFmpeg, a powerful and versatile multimedia framework. This guide provides step-by-step instructions for Linux users, helping you to improve the viewing experience of your video content.

Fixing Audio Recording Issues with Speech Recognition Package on Linux Mint

Having trouble recording audio for two applications on Linux Mint while using the Speech Recognition package? Learn about common issues and how to fix them in this tech support article. Read more to find a solution.

Docker and Certificates: Not Creating SSL Certificates Inside Docker

This article discusses why Docker doesn't create SSL certificates inside Docker containers and provides solutions to generate and mount certificates.

BTRFS Self-Healing with MDADM RAID: A Solution for Bitflip Detection

This article explores the use of BTRFS self-healing in conjunction with MDADM RAID for handling bitflip issues. The process is discussed when BTRFS detects a bitflip and how MDADM helps checksums to ensure data integrity.

Resume Suspended Upgrade from Ubuntu 22.04 to 24.04: A Tech Support Guide

Having trouble resuming a suspended upgrade from Ubuntu 22.04 to 24.04 using Software Updater? Learn how to handle the Thunderbird pop-up message and continue your upgrade process with our tech support guide.

Sending Backup Files via Command Line (Headless Debian Server) Offsite: A Workaround for Mutt and Redmine Database with Outlook Account

Learn how to send backup files via command line using Mutt and Outlook on a headless Debian server despite recent security changes.

Configure Access Point Table on x86 Linux Mint to Connect Devices

Learn how to configure an Access Point (AP) table on x86 Linux Mint to connect devices using hostapd and a DHCP server. Follow these step-by-step instructions for a seamless setup.

CentOS Cluster: Master Node Not Recognizing Nodes - SLURM 18.08.8

This article addresses the issue of a CentOS cluster master node not recognizing nodes when using SLURM 18.08.8. It provides potential solutions and recommendations for running batch commands and programs.

apt-get Sources List: Unable to Install Packages in Kali Linux

Learn how to resolve apt-get sources list errors that prevent the installation of packages in Kali Linux.

Incorrect SAR Reporting in FFProbe for NTSC DVD Format

Having trouble with FFProbe reporting the wrong SAR (Sample Aspect Ratio) value compared to QuickTime Player? This issue can occur when dealing with NTSC DVD format files. Learn more about the correct interpretation of SAR and possible solutions.

Improving Slow Virtual Machine Performance of Ubuntu Server 24.04 on VirtualBox

Learn how to improve the performance of slow virtual machines running Ubuntu Server 24.04 on VirtualBox. This article provides tips and tricks to optimize VM settings for a smoother and faster virtual experience, even when running multiple VMs simultaneously on a Windows Server host setup.

Rotating and Shrinking Video: One First with FFmpeg

Learn how to rotate and shrink videos using FFmpeg in this tech support article. This guide covers output quality, size, encoding speed, and the considerations for rotating with shrinking.

Elastic Beanstalk Container Commands Not Executing in Docker on Amazon Linux 2023

Having trouble executing container commands in Docker on Amazon Linux 2023 in your Elastic Beanstalk environment? Learn about possible solutions to this issue in this article. Keywords: Elastic Beanstalk, Docker, Amazon Linux 2023, Container Commands.

Chroot/mnt Failures While Installing GRUB: What to Do?

Having trouble installing a GRUB disk image using QEMU and encountering chroot/mnt failures? Learn how to navigate this issue and successfully configure GRUB.

Ubuntu 22.04.5 LTS: Troubleshooting './configure' always asking to run 'make config/usr/src/linux-headers-5.15.0-124' even after doing it

In this tech support article, we will troubleshoot an issue encountered when building the Lustre client source on Ubuntu 22.04.5 LTS, where './configure' always asks to run 'make config/usr/src/linux-headers-5.15.0-124' even after it has been done. We will provide a step-by-step guide to help you resolve this problem.

Best Practices for Using BTRFS with Multiple HDDs on Debian Bookworm Headless