Linux provides multiple ways to query network configuration. While the underlying concepts remain consistent, modern tools have evolved from the older net-tools utilities. IP Address, MAC Address, and Netmask The modern replacement for ifconfig is ip addr: $ ip addr show This displays all network interfaces with their IPv4 and IPv6 addresses, MAC addresses, and…
When using KDE Plasma with GTK applications, you’ll notice the mouse cursor switches to a default style when moving from the desktop to applications like Firefox or GIMP. This happens because GTK and Qt use separate cursor theme configurations by default. Quick Fix The easiest solution is to explicitly configure GTK to use your chosen…
Modern Linux distributions typically auto-detect and load NVIDIA drivers without requiring manual xorg.conf configuration. However, if you’re using an older setup with an explicitly configured xorg.conf file, or if you need to customize NVIDIA driver behavior, you can disable the NVIDIA logo that displays during X server startup. Modern Approach (Wayland/Systemd) On current distros using…
If you prefer booting to a minimal environment and starting your desktop manually, you can configure startx to launch KDE Plasma instead of your default desktop environment. Understanding startx and Desktop Selection The startx command reads configuration files to determine which desktop environment to start. On systemd-based distributions (Fedora, RHEL, Arch), the startup chain typically…
You may need to prevent certain packages from being updated during system maintenance—the kernel on production servers, or specific library versions you’ve carefully tuned. When you run dnf update or yum update, you want those packages skipped entirely. The solution is straightforward: add an exclusion to DNF or YUM’s configuration file. Configuration Syntax Add this…
tmpfs delivers exceptional I/O performance since it lives entirely in RAM. Exporting it via NFS can be useful for temporary caches, build artifacts, or high-speed data sharing between systems on a trusted network. The catch: NFS needs additional configuration to export pseudo-filesystems like /dev/shm. Without the right settings, you’ll hit access denied errors or fsid…
On Fedora/RHEL-based systems: dnf install ecryptfs-utils On Debian/Ubuntu: apt-get install ecryptfs-utils Load the kernel module modprobe ecryptfs To ensure the module loads automatically on boot, add it to /etc/modules-load.d/: echo “ecryptfs” | sudo tee /etc/modules-load.d/ecryptfs.conf Create directories You’ll need two directories: one for encrypted storage (.private) and one as the mount point (private). The .private…
Google Apps accounts can connect to Google Talk through XMPP, and Pidgin handles this well. Here’s how to configure it properly. Adding the Account Open Pidgin and create a new account. You’ll configure it across two tabs. Basic Tab Settings: Setting Value Protocol XMPP Username eric (local part of your email) Domain example.com (your domain…
Firefox performance on Linux can be significantly improved through configuration tuning. Most of these settings apply across platforms, though this guide focuses on Linux-specific considerations. Network Pipelining HTTP pipelining allows Firefox to send multiple requests on a single connection before waiting for responses. Modern HTTP/2 and HTTP/3 handle multiplexing more efficiently, but pipelining can still…
This guide documents theme configuration for GNOME 2 and early KDE environments. If you’re running GNOME 40+, KDE Plasma 5, or later, refer to your desktop’s modern theming systems instead—most of these packages and configuration methods no longer apply. Historical Context The Shiki Colors theme paired with GNOME Colors icons represented a popular approach to…
If you don’t already have a key pair, use Ed25519 — it’s faster and more secure than RSA: ssh-keygen -t ed25519 -C “your_email@example.com” For older systems that don’t support Ed25519, RSA with 4096 bits still works: ssh-keygen -t rsa -b 4096 Keys are stored in ~/.ssh/ by default: id_ed25519 (private) and id_ed25519.pub (public) for Ed25519,…
Installing the NVIDIA driver on Fedora via akmod (automatic kernel module) is the cleanest approach when using RPM Fusion. The driver rebuilds automatically whenever the kernel updates, saving you manual reinstalls. Prerequisites First, verify your GPU is supported. Check the NVIDIA driver support matrix for your hardware. Most consumer and professional cards from the past…
The mailx (or s-nail on modern distributions) command remains useful for scripted email delivery, particularly when you need to send alerts or notifications automatically. Gmail’s SMTP service works well for this, though it requires TLS authentication and specific configuration. Prerequisites Most Linux distributions include mailx or s-nail by default. On systems using s-nail (Ubuntu 20.04+,…
A Linux box serving as a network gateway needs two network interfaces: eth0: Connected to the local network (LAN) with IP 192.168.0.1 eth1: Connected to the upstream network (Internet) with IP 198.51.100.1 The goal is to allow clients on the 192.168.0.0/16 network to route traffic through this gateway to reach external networks. Enable IP Forwarding…
SELinux provides mandatory access controls that catch security violations most firewall and file permission rules miss. Before disabling it, exhaust other options — SELinux warnings often reveal real security problems worth understanding. That said, there are legitimate reasons to adjust SELinux: testing application behavior without policy violations, troubleshooting misbehaving software, or running systems where the…
mpv inherits much of MPlayer’s command structure, but with modern improvements for hardware acceleration, Wayland support, and codec handling. Here’s how to configure default startup volume and playback position. Configuration File Edit ~/.config/mpv/mpv.conf and add your defaults: volume=80 start=10 The volume parameter sets initial volume as a percentage (0–100). The start parameter specifies playback start…
When using lftp to connect to FTP servers, you may encounter a stall with “Making data connection” after logging in: < — 227 Entering Passive Mode (xx,xx,xx,xx,xx,xx) —- Connecting data socket to (yy,yy,yy,yy) port zz `ls’ at 0 [Making data connection…] The connection hangs indefinitely, though other clients like FileZilla work fine on the same…
MPlayer is largely unmaintained; mpv is the actively developed fork that replaced it. Most MPlayer subtitle commands work in mpv with minor syntax adjustments. This guide covers both. External Subtitle Files Handling Character Encoding Chinese subtitle files often display as garbage when the player guesses the encoding wrong. Specify the correct codepage explicitly. For an…
Fedora 中文字体的显示一直是个常见问题，特别是在英文环境中。通过合理的字体配置，可以获得清晰舒适的中文显示效果。本文介绍的方案使用开源字体，这些字体在 Fedora 的标准仓库中都可以获得。 快速配置 如果你只想快速完成配置，运行以下命令： sudo dnf install cjkuni-ukai-fonts cjkuni-uming-fonts sudo wget https://raw.githubusercontent.com/zma/config_files/master/others/local.conf \ -O /etc/fonts/local.conf 这会安装文鼎楷体和文鼎明体，并配置字体渲染优先级。注销后重新登录即可生效。 推荐字体包 Fedora 仓库中提供了多个中文字体包： 基础中文字体： # 文鼎明体 — 适合正文阅读，清晰度高 sudo dnf install cjkuni-uming-fonts # 文鼎楷体 — 适合标题和打印 sudo dnf install cjkuni-ukai-fonts Google Noto 字体（推荐）： # Noto Sans CJK — 现代、清晰、覆盖全面 sudo dnf install google-noto-sans-cjk-fonts # Noto Serif CJK…
Git and SSH integrate seamlessly for version control infrastructure. An SSH-based Git server works well for small teams where all members are trusted and have administrator-level access to all repositories. This approach is straightforward to deploy, but lacks fine-grained access control. For teams that need role-based repository access or audit trails, consider dedicated tools like…