Articles about linux | UserComp.com | Page [ 13 ]

Linux: Cache Coherency DMA

Resolve data corruption in Linux drivers by using DMA mapping and synchronization to ensure CPU cache consistency with device memory.

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How to quickly transfer large amounts of data from old hard drive to new computer

Resolve data migration from legacy PATA drives to modern systems using USB adapters and Robocopy for reliable, large-scale file transfers.

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Automating Directory Renaming with Number Matching List using Shell Scripting

Automate renaming directories by mapping numeric IDs from a list to specific names using a safe Bash script.

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Enabling Jumbo Frames on a Linux Server (Ubuntu 22.04) Connected to a MikroTik Switch

Configure jumbo frames on Ubuntu 22.04 and MikroTik to reduce CPU overhead for high-bandwidth tasks like video surveillance.

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Windows 11: External Monitors Stopped Working After DELL 6000 Dock Connection

Resolve external monitors failing to work with Dell 6000 dock on Windows 11 by updating drivers, adjusting BIOS settings, and disabling USB selective suspend.

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Why Would WSL Use the Wrong Distro from the Command Line on Occasion?

Resolve WSL launching the incorrect distribution by checking wsl --list --verbose and setting the correct default with wsl --set-default.

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Formula Not Working: Troubleshooting Performance Issues

Resolve spreadsheet formula performance issues by eliminating inefficient references, volatile functions, and external links to speed up recalculation.

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Troubleshooting Linux Device Not Reachable During Network (Ping)

Resolve Linux device ping failures by diagnosing physical link issues, verifying IP and routing configurations, and adjusting firewall rules to restore network connectivity.

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Using Linux as a Replacement for a Female-Female USB Adapter?

Resolve the misconception that Linux software can replace a physical female-female USB adapter for direct device-to-device connections.

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Monitor API Status

Automate continuous API health checks and receive email alerts on Linux when the service returns non-200 HTTP status codes.

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Do You Need to Reboot a Linux System After Group Membership Changes?

Resolve group membership changes for existing users without rebooting by logging out and back in to refresh the session.

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Setting Port Forwarding for Guest VM using iptables: A Proof of Concept

Configure iptables NAT rules to forward external traffic to a Libvirt guest VM.

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Find and replace string in a file using 'sed' or 'awk'

Replace all occurrences of a specific string in a file using sed or awk with in-place editing and proper escaping.

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Kerberos 5 not installed on Ubuntu 24.04: Broken packages

Resolve broken package errors preventing Kerberos 5 installation on Ubuntu 24.04 by refreshing the APT cache and fixing dependencies with apt --fix-broken install.

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Adding an Extra Hard Disk to an Ubuntu Machine: A Step-by-Step Guide

Resolve the inability to use a newly installed hard disk on Ubuntu by guiding users through partitioning, formatting, and persistent mounting.

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Determining Script Execution on Windows, Linux, and MacOS

Resolve cross-platform script execution failures by configuring Windows registry extensions and Linux macOS shebang lines.

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How to Connect Bluetooth Permanently in Linux

Resolve Bluetooth devices disconnecting after reboot by permanently pairing them via bluetoothctl and enabling the bluetooth.service for automatic startup.

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Configuring DNS Servers in Kalilinux: db.system.com and db.testing.com

Configure BIND9 to serve db.system.com and db.testing.com by defining zones in named.conf.local, creating zone files in /etc/bind, and setting correct permissions.

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How to Open a Link in a New Firefox Tab, Copying the Current Tab History

Firefox prevents userscripts from cloning tab history due to security sandboxing, so use middle-click or extensions like Tree Style Tab for efficient tab management.

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Gluetun Not Found: TUN Device Docker

Fix Gluetun TUN device error in Docker by adding NET_ADMIN capability and mounting /dev/net/tun.

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Extracting Grid Numbers from Image Table using OCR

Extract numerical grid data from image tables using OCR tools like PowerToys or Tesseract while preserving column structure and validating results.

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Optimizing VHD/VHDX using WSL on Windows 11

Shrink WSL VHDX files to reclaim disk space using PowerShell Optimize-VHD without data loss.

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Extracting Mail Text Strings to a Spreadsheet: One Email Formula

Extract specific text strings from email bodies or subject lines into a spreadsheet using a single dynamic formula.

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PHP File Prints Contents Instead of Executing on Ubuntu UnityOS

Resolve PHP source code printing instead of executing by running scripts with the php binary prefix like php index.php.

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Preventing DROP of SCTP Packets: A Comprehensive Guide

Resolve SCTP packet drops caused by buffer overflows, firewall misconfigurations, and MTU mismatches on Linux systems.

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Setting Up EXT4 GPT Partition Type on an SSD for Windows

Resolve the inability to format SSDs as EXT4 on Windows by using GPT initialization and third-party tools like SharpExt4.

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Understanding Packet Forwarding vs Local Delivery in Network Routing

Resolve firewall misconfigurations by distinguishing between local delivery and packet forwarding in Linux Netfilter.

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Become a Computer Superuser: Earning System Administrator Certifications

Bridge the gap between theoretical knowledge and practical skills for managing Linux, Windows, and macOS infrastructure.

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Easily Cut Long Video Collections into GIFs: A Tech Support Guide

Resolve large file sizes and poor quality when converting long videos to GIFs using FFmpeg command-line parameters.

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Extending Textbox Placeholder in Slide Title

Resolve unexpected text wrapping in slide titles by manually resizing placeholder boundaries or setting precise width dimensions.

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Dual SSD Dual OS PC: SATA SSD Not Showing

Resolve SATA SSD not showing in dual-boot by verifying UEFI detection, aligning boot modes, and ensuring consistent GPT partition tables.

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Checking HTTPS Port Without wget/curl/ncbarealpinesystem

Verify HTTPS port availability and SSL certificate validity using curl without wget, nc, or bare Alpine system utilities.

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How to Upgrade pip3 on Debian 12 (Bookworm)

Resolve broken Python environments on Debian 12 by upgrading pip3 using apt instead of the unsafe sudo pip3 install --upgrade pip command.

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RESOLVED: VPN Client Access Interfaces instead of Restricted Subnet - Disable Forwarding Option?

Isolate VPN clients from restricted subnets by disabling per-interface forwarding instead of globally disabling IP forwarding on Debian.

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Running Chrome OS on a Chromebook: A Guide for Linux and Ubuntu Users

Enables Linux app support on locked Chromebooks by using Developer Mode and Crostini containers instead of attempting impossible OS installations.

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Running PowerShell Commands with Spaces using WSL: A Complicated Example

Resolve WSL Bash argument parsing errors when executing complex PowerShell commands containing spaces and special characters.

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Unable to Run OpenGL Programs in Debian 12 with SDL

Resolve OpenGL rendering failures in Debian 12 SDL apps by adding users to the video group and verifying driver installation.

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Migrating Arch Linux Installation to a New Machine: Listing Pacman AUR Installed Packages and Mounted Drives

List manually installed AUR packages and mounted drives to preserve software and storage layout during Arch Linux migration.

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How to Overcome Password Problems when Transferring a File from Linux Centos 7 to Linux Synology

Resolve password authentication failures when transferring files from CentOS 7 to Synology NAS by verifying SSH service status and credentials.

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Sync Copy Branches across Orgs: A Tech Support Guide

Resolve cross-organization Git branch synchronization by configuring remotes, fetching external refs, and creating local tracking branches for code parity.

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Blackscreen issue on Lenovo LOQ: NVIDIA GPU not detected

Fix black screen and undetected NVIDIA GPU on Lenovo LOQ by verifying BIOS settings, updating firmware, and configuring hybrid graphics.

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Understanding Differences in Basenames and Outputs of '$x' and 'echo ${x##*/}'

Extract the basename from a full file path in Bash using parameter expansion instead of external commands.

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Victim Loses Internet Connection Due to ARP Spoofing Attack from Kali Linux Virtual Machine in VirtualBox

Explains how ARP spoofing from a Kali Linux VM in VirtualBox poisons the victim's ARP cache, redirecting traffic to the attacker and causing internet loss.

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Differences between apt-install and pip-install for pyelftools

Resolve pyelftools installation conflicts by choosing apt for system stability or pip with virtual environments for isolated, up-to-date Python dependencies.

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Grep Command Not Working with iwconfig: Troubleshooting Steps

Resolve grep failures with iwconfig by redirecting standard error or switching to the modern iw command for reliable wireless interface parsing.

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How to Declare Readonly Associative Array and Error Redirection in Debian Gnu/Linux (Version 12.4)

Solve immutable configuration storage and error stream management in Bash scripts on Debian 12.4

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Convert Date from DD-Mon-YY to dd.mm.yy

Resolve SQL date format conversion errors when transforming DD-Mon-YY strings to dd.mm.yy in MySQL and PostgreSQL.

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Storing Photos on a WD Home Drive (Linux) for a Shared PUBLIC Folder in a Running Ubuntu 20.4 Server

Mount a WD Home Drive SMB share on Ubuntu 20.04 for automatic boot access to a shared public photo folder.

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Replacing SEQ Field with Plain Text

Resolve broken numbering in Microsoft Word by converting dynamic SEQ fields to static plain text.

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Laravel Command Not Found: Accidentally Changed Terminal Path

Resolve the Laravel command not found error by adding the Composer vendor bin directory to your system PATH.

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