Converting PPTX presentations to image files on Linux requires a two-step process: first convert to PDF, then rasterize to your target image format. This approach preserves slide layout and fonts better than direct conversion tools. Convert PPTX to PDF Start by converting your PowerPoint file to PDF using LibreOffice: libreoffice –headless –convert-to pdf presentation.pptx The…
Converting between Simplified Chinese (SC) and Traditional Chinese (TC) characters on Linux is straightforward with OpenCC, a mature open-source tool designed specifically for this task. Installing OpenCC Most distributions include OpenCC in their standard repositories: # Debian/Ubuntu sudo apt install opencc # RHEL/CentOS/Fedora sudo dnf install opencc # Arch sudo pacman -S opencc Alternatively, build…
iptables remains the standard firewall configuration tool on Linux systems, though many distributions now layer it with ufw or firewalld. Understanding the basics helps you troubleshoot, migrate, or work on systems without those abstractions. Understanding iptables Fundamentals iptables operates on three main chains: INPUT: rules for incoming traffic FORWARD: rules for traffic passing through the…
Converting a series of JPG images into a single PDF is useful for creating documents, presentations, or archiving scanned photos. Linux offers several tools for this task, each with different trade-offs between simplicity, quality preservation, and features. Using img2pdf (Recommended) For most cases, img2pdf is the best choice because it merges images without re-encoding or…
When you need a command or library file but don’t have the package installed, you need to search for which package provides it. On Red Hat/Fedora systems, yum provides or dnf provides does this. On Debian/Ubuntu, the equivalent is apt-file. Red Hat, Fedora, and CentOS (DNF/YUM) Use dnf provides (or yum provides on older systems):…
Managing display power and screen blanking on Linux systems is essential for reducing power consumption on servers, headless machines, and workstations. Two primary tools handle this: setterm for software-based blanking and vbetool for hardware power management via VESA DPMS. Screen Blanking with setterm The setterm command controls when and how the console screen blanks during…
Monitoring hardware temperatures is essential for laptop health and performance. On Linux, lm-sensors provides CPU and system temperatures, while smartctl (from smartmontools) gives you drive health data including temperature readings. Installation Debian/Ubuntu/Linux Mint: sudo apt install lm-sensors smartmontools Fedora/RHEL/CentOS: sudo dnf install lm_sensors smartmontools Arch Linux: sudo pacman -S lm_sensors smartmontools Detecting Sensors Before reading…
The No-IP Dynamic Update Client (DUC) keeps your dynamic DNS hostname pointing to your current IP address. Here’s how to install and configure the noip2 client on modern Linux distributions. Prerequisites Before you start, install the required build tools and development libraries: sudo apt-get update sudo apt-get install build-essential gcc libc6-dev If you’re on a…
If you’ve compiled a kernel module for a specific kernel version or need to pin a package to prevent automatic updates, you’ll want to exclude it from yum or dnf. There are several approaches depending on whether you need a permanent exclusion, per-repository exclusion, or temporary lockdown. Global Exclusions in Configuration The simplest approach is…
DVI (Device Independent) files are the output format from TeX and LaTeX compilers. While modern workflows typically generate PDF directly with pdflatex, you’ll still encounter DVI files in legacy documents, archived projects, and specific publishing pipelines that require intermediate processing. Viewing DVI Files Xdvi Xdvi is the most reliable dedicated DVI viewer and remains the…
When you install a JDK on Linux, you need to configure environment variables so your shell uses the correct Java binary and build tools can locate the installation. If you have multiple Java versions installed, proper configuration becomes essential. Why Set Java Environment Variables Setting JAVA_HOME and PATH ensures: Tools and applications can locate the…
Custom headers and footers in Apache directory listings let you add branding, instructions, or navigation without modifying the core file listing. This is useful for public file archives, download directories, or any indexed directory you want to customize. Basic Setup with .htaccess Add these directives to .htaccess in the directory where you want custom listings:…
Memory leak detection is critical for C program reliability. Several tools work at different stages of development—compile time, runtime, and production scenarios. Your choice depends on performance tolerance, integration needs, and how much detail you require. AddressSanitizer (ASan) AddressSanitizer is the first tool to reach for in 2026. It’s compiler-integrated, fast, and catches a broader…
GNOME’s default Alt-Tab behavior switches between applications, grouping all windows from the same app together. If you work with multiple windows in a single application—multiple browser tabs, text editors, or terminals—this becomes frustrating. Here’s how to change it to window-based switching. Using the Alternate Tab Extension The simplest approach is enabling GNOME’s built-in Alternate Tab…
If you want Emacs to run in the terminal without opening an X window, you have several practical options depending on your setup and workflow. Option 1: Install emacs-nox (Recommended for servers) The cleanest approach is installing the no-X variant of Emacs, which is built without X11 support. This reduces memory overhead and startup time…
If you need direct control over your firewall rules, you can disable firewalld and use iptables instead. This guide covers the setup process and best practices for maintaining persistent rules. Stop and disable firewalld If firewalld is currently running, stop it and prevent it from starting on boot: sudo systemctl stop firewalld sudo systemctl disable…
The lp command is the standard tool for printing from the Linux command line. It interfaces with CUPS (Common Unix Printing System), the printing backbone on virtually all modern Linux distributions. Basic Printing Send a file to your default printer: lp text-file.txt Specify a particular printer: lp -d printer-name text-file.txt List available printers and identify…
Backing up a complete IMAP account with thousands of messages across nested folders requires automation to preserve folder structure and avoid manual errors. This guide covers three modern tools and provides detailed setup for the most flexible option. Choosing your backup tool offlineimap — Most flexible for complex folder structures and label handling. Active maintenance…
If xterm displays Chinese, Japanese, or Korean characters as empty boxes or rectangles, the problem is almost always a missing or improperly configured font with CJK glyphs. Configure fonts in ~/.Xresources xterm reads font configuration from ~/.Xresources. Add these lines: XTerm*utf8: 1 XTerm*locale: true XTerm*faceName: Noto Mono XTerm*faceSize: 11 XTerm*faceNameDoublesize: Noto Mono XTerm*dynamicColors: true The…
When you need to combine multiple video files (like video1.mp4, video2.mp4, and video3.mp4) into a single output file, FFmpeg is the standard tool on Linux. It’s faster, more reliable, and better maintained than older tools like mencoder. Using FFmpeg with the Concat Demuxer The most robust approach uses FFmpeg’s concat demuxer, which properly handles file…