Articles in Linux | UserComp.com

ZFS Snapshots Empty or Missing on Ubuntu 20.04 Server: Troubleshooting

This article discusses the common issues with ZFS snapshots on Ubuntu 20.04 servers, including empty or missing snapshots, and provides troubleshooting steps.

Error Exiting tar: Previous Errors

When running a tar command on CentOS 8, you encounter an error message: tar: Exiting failure status due to previous errors. This article explains the cause and provides solutions.

Setting Proper Internal DNS Servers for a Homelab Network

This article provides instructions on how to set up proper internal DNS servers for a homelab network with three bind9 servers acting as authoritative and recursive DNS servers.

Conky Doesn't Show Curves: Straight Lines Instead

Users report issues with Conky not displaying curves or circles, resulting in straight lines. This issue can occur on Wayland and may be related to the installation of conky-lua-nv. In this article, we will discuss potential solutions to resolve this problem.

Prompted Password Update for crs_svc User in sudoers: NOPASSWD Command

Learn how to update the password for the crs_svc user in the sudoers file without being prompted using the NOPASSWD command.

Mysterious Linux Drive/Folder Appears Mounted in Windows 11

Users report a mysterious Linux drive or folder appearing mounted in Windows 11. This issue may cause confusion and potential data security concerns. In this article, we'll discuss possible causes and solutions to unmount the Linux drive or folder in Windows 11.

Setting Up a VPN Server or Client: A Comprehensive Guide

Learn how to set up a VPN server or client on various platforms such as Linux, Windows, and MacOS. This comprehensive guide covers the process step-by-step and includes instructions for using OpenWRT as a router. Try not to miss out!

Troubleshooting: Screen Takes Over 10 Seconds to Execute Certain Terminal Commands

Experiencing delays of over 10 seconds when executing certain terminal commands using the Screen utility? Learn possible causes and solutions.

Unable to Access Jupyter Server on WSL Ubuntu when using Mac for GPU TensorFlow

This article outlines the steps to access a Jupyter server running on WSL Ubuntu from a Mac machine while utilizing GPU TensorFlow.

Fixing Apache PHP Project: Large Post Requests (40MB) with 500 Internal Error

This article discusses a common issue with Apache and PHP where large post requests (around 40MB) cause a 500 internal error. We will explore the root cause and provide solutions to resolve this issue, specifically for Laravel APIs behind Apache with SSL.

Debugging ROS2 Commands: Troubleshooting Installed Naoqi Driver on Windows 10

This article provides a step-by-step guide on how to debug ROS2 commands related to the Naoqi driver installation on Windows 10.

Debugging ROs2 Command: Installed Naoqi Driver on Windows 10

This article provides instructions on debugging ROs2 Naoqi Driver on Windows 10.

Unable to Access SSH Umbrel Server: Authentication Failed

Users report being unable to access their SSH Umbrel server, with authentication errors such as 'Authentications continue: publickey, password: Permission denied, please try again.' This article provides solutions to regain access to the server.

Creating P12 OpenSSL RC2-40-CBC Certificate with OpenSSL 3.2.1 on Fedora 40

Learn how to create a P12 certificate with RC2-40-CBC encryption using OpenSSL 3.2.1 on Fedora 40.

MobaXterm and Raspberry Pi: Unable to Connect to IPv6 VNC Host

This article explains how to resolve the issue of being unable to connect to an IPv6 VNC host using MobaXterm on a Raspberry Pi.

Monitor CPU Memory Usage: A Great Start with SuperUser, But How About Advanced Duration?

SuperUser provides a great solution for monitoring CPU memory usage through command line. However, to gain advanced insights, knowing the duration of the command is necessary.

Automatically Reconfiguring SDDM Monitor Getting Connected in Headless Setup

Learn how to automatically reconfigure SDDM monitor when getting connected in a headless setup. This article explains the process for Kubuntu users.

Bash Command: Understanding '//xxx[]' and Its Usage

In this tech support article, we will explain the usage and functionality of the '//xxx[]' command in Bash. This command is often used in scripts and can be confusing for new users. We will provide examples and explain how it can be used effectively.

Abaqus CAE Fails to Launch via RDP/VNC on CentOS

Users report that Abaqus CAE fails to launch when accessing a CentOS system remotely via RDP or VNC. The software loads without issues when logged in physically. This article provides suggested solutions to resolve the issue.

ALSA Doesn't Show USB MIDI Controller Events with Jack Client

Learn how to troubleshoot and resolve issues with ALSA not recognizing MIDI events from a USB MIDI controller when using Jack client.

Chaining Two WireGuard Interfaces: Ubuntu VPS as WG Server with Hide.me VPN

Learn how to chain two WireGuard interfaces on an Ubuntu VPS acting as a WireGuard server, connecting to another VPN (Hide.me), allowing clients to use the Hide.me VPN IP and avoiding IP loss.

Adding Milkdrop Visualization Presets to VLC media player on Linux

Learn how to add Milkdrop visualization presets to VLC media player on Ubuntu 23.10 and Zorin OS.

Automating Script Run at Startup for Unraid Server

Learn how to create and run an automated script at startup for your Unraid server using SSH and command prompts.

Saving FFmpeg Stream to Another Device

Learn how to save an FFmpeg stream to another device using FFplay and UDP streaming.

Automating Command Logging Sessions in PuTTY: A How-To Guide

Learn how to automate command logging sessions in PuTTY for efficient and secure remote access management. Follow our step-by-step guide.

Masters Proxies: Synctwo Directories using Bash Script - Boolean Expression Not Working as Expected

In this article, we will explore how to sync two directories using Masters Proxies and a Bash script. However, we encountered an issue with the Boolean expression not working as expected. Let's dive into the problem and find a solution.

Understanding FFmpeg's ffv1-intra-frame encoding with use-context0

In this tech support article, we will explain how to use the 'use-context0' option in FFmpeg to force intra-frame encoding for the ffv1 codec. This can be useful for specific use cases and is detailed in the compression settings.

Poor Video Quality during Screen Recording on Elementary OS 7.1 (MacBook Pro 7,1)

Users of Elementary OS 7.1 on a MacBook Pro 7,1 encounter poor video quality during screen recordings with a 200ms update rate.

Understanding IPTables NAT for Static LANs behind Dynamic WAN

In this tech support article, we'll explain how IPTables NAT works for static LANs behind dynamic WAN networks. Traceroute to google.com from your LAN board reveals the need for this setup. Let's dive in.

Restart Graphics Driver in Ubuntu: Equivalent to Windows Shortcut

Learn how to restart the graphics driver in Ubuntu, equivalent to the Windows shortcut (Win + Ctrl + Shift + R). This article covers using Ubuntu on a laptop with multiple monitors and KVM.

Preserving Bitstream while Decreasing Opus Audio Bitrate using FFmpeg

Learn how to convert an Opus audio file downloaded from YouTube while preserving the original bitstream using a simple FFmpeg command.

MariaDB MySQL History File in Official Docker Image

Learn about the MariaDB MySQL history file in the official Docker image and its potential use in development setups.

Reserving CPU Cores for Scripts on a Shared Linux Server without Root Privileges

Learn how to reserve CPU cores for scripts on a shared Linux server without root privileges. This technique can help improve the performance of your applications and prevent resource contention.

Multi-hop SSH Tunnel with Two VPS Servers: S1 to S2 Setup

Learn how to set up a multi-hop SSH tunnel between two VPS servers (S1 and S2) using NetModSSH. Secure your local machine's internet access through this tunnel.

Equivalent to python3-mpipinstall on Debian-like systems

If you're trying to install changedetection.ioplaywright without Docker and following instructions given for Debian-like systems, you may need to use an alternative to python3-mpipinstall. In this article, we will discuss the equivalent packages for Debian, Ubuntu, and other Debian-based distributions.

UFW Rule Not Followed for Docker: Troubleshooting and Solutions

This article explains the common UFW rule not followed issue when using Docker and provides solutions to troubleshoot and fix the problem.

VPS Connection via VPN Successful but SSH Unreachable

The user is able to connect to their VPS via VPN but is unable to connect via SSH. This article provides suggested troubleshooting steps.

Setting Up a Personal Apache Server: VM not Connected Directly to the Internet

Learn how to set up a personal Apache server on a Ubuntu Virtual Machine (VM) that is not directly connected to the Internet. Follow these steps to configure your server and enable Internet access.

Zshrc Not Recognized: Troubleshooting Homebrew Installation on Terminal

If you're encountering a 'zshrc not recognized' error while installing Homebrew on your terminal, this article will guide you through the troubleshooting process.

Error Occurred: Signature Verification Failure in Ubuntu Repository

This article explains the cause and solution for an error that occurs during signature verification in Ubuntu repositories, preventing the repository from being updated.

Responding to BOOTP requests using TFTP daemon in Fedora

This article explains how to configure the TFTP daemon in Fedora to respond to BOOTP requests.

GPG Error: Repository Not Updated - Signature Verification Failed

This article explains how to resolve a GPG error that occurs during repository updates in Linux systems. The error message 'error occurred signature verification. repository not updated' indicates that the previous index files are being used despite the repository not being updated. This article provides a solution to this issue.

Accidentally Deleted 'PackageCache': Uninstalling and Installing Programs Issue