The caption LaTeX package provides customizable captions for floats (figures, tables, and other environments). It offers much more control than LaTeX’s default caption formatting. Install on Fedora The caption package is included in the texlive collection: # Install the full texlive collection (includes caption) sudo dnf install texlive-collection-latexrecommended # Or install just the caption package…
If you’ve made changes to your working copy but haven’t committed them yet, you can discard them using svn revert. This is useful when you want to abandon edits and go back to the last committed version. Basic Revert To revert all changes in your working copy, run this from the repository root: svn revert…
MySQL Cluster uses NDB (Network Database) storage engine to provide high availability and data redundancy across multiple nodes. This guide covers installation and configuration on modern RHEL-compatible systems. Prerequisites Three or more servers (minimum: one management node, two data nodes, one SQL node) Rocky Linux 9 or AlmaLinux 9 Root or sudo access Static IP…
Linux can manage multiple swap partitions or files simultaneously, each with an assigned priority. The kernel allocates swap pages from highest to lowest priority, with round-robin allocation among equally-prioritized areas. Setting Swap Priority with swapon Use the swapon command to activate a swap partition and set its priority: swapon -p 10 /dev/sdc1 The -p flag…
Tracking branches link your local branch to a remote branch, enabling git pull and git push to work without specifying the remote and branch name each time. Here’s how to configure this. The basic command To set an upstream tracking branch for your current branch: git branch –set-upstream-to=origin/branch-name Or the shorter alias: git branch -u…
Swap space is essential for system stability, allowing the kernel to move less-frequently-used memory pages to disk when physical RAM is exhausted. Here’s how to set up a dedicated swap partition. Step 1: Create the Partition Use fdisk, gdisk (for GPT disks), or parted to create a new partition. For modern systems with GPT partition…
GNOME uses .desktop files in ~/.config/autostart/ to launch applications when you log in. This mechanism works across GNOME, XFCE, KDE, and most other modern desktop environments. Basic Setup Create a .desktop file in ~/.config/autostart/. Here’s a minimal example: [Desktop Entry] Type=Application Name=My Autostart Script Exec=/home/user/bin/myscript.sh Save this as ~/.config/autostart/myscript.desktop and it will run on your…
If you’re creating posters—whether for conferences, events, or general communication—you’ll want the right tools and guidance. Here’s a practical breakdown of what works. Design Software Inkscape is your go-to for vector-based design. It’s free, open-source, and handles logos, text, and scalable graphics without quality loss. Use it when you need clean lines, precise shapes, or…
GNOME Keyring stores passwords, SSH keys, and certificates. If you need to update your keyring password, you can do this through the Seahorse graphical interface or directly from the command line. Using Seahorse (GUI Method) Seahorse is GNOME’s visual keyring manager. Open it with: seahorse Once open: Go to the View menu and select By…
To disable all active swap spaces on Linux, run: swapoff -a The -a flag targets all currently enabled swap devices and files. This forces the kernel and applications to rely entirely on physical RAM. When You’d Do This Disabling swap is useful for: Performance testing: Eliminating swap I/O variance to get consistent benchmarks Latency-sensitive workloads:…
To enable debugging, configure your CMake build with CMAKE_BUILD_TYPE set to Debug. This tells CMake to invoke the compiler with the -g flag, generating debug symbols that tools like gdb and lldb need. From your project’s root directory: cmake -DCMAKE_BUILD_TYPE=Debug -B build cd build make The -B build flag creates a separate build directory, which…
ANSI C is the standardized version of C defined in 1989, specifying the language’s syntax and semantics formally through a grammar. Understanding this grammar is essential for building tools that parse, analyze, or transform C code. Grammar Basics The ANSI C grammar is defined using Backus-Naur Form (BNF), a notation for specifying formal grammars. The…
When you need to download a video playing in your browser, Chrome offers several solid options depending on your workflow and the video source. Browser Extensions Video Download Helper is a reliable choice for Chrome that works across most video hosting platforms. Install it from the Chrome Web Store and use it to capture videos…
When managing many systems, manually confirming host keys for each new connection gets tedious fast. You can configure SSH to automatically add unknown hosts to ~/.ssh/known_hosts without prompting. The Risk Trade-off Before implementing this, understand what you’re doing: disabling strict host key checking opens you to man-in-the-middle attacks. Only use this in trusted networks where…
Pasting external code into Vim often triggers unwanted autoindent behavior, adding extra indentation and breaking formatting. Vim’s paste mode disables all automatic indentation while inserting text, letting you paste code exactly as-is. Quick paste mode toggle Enable paste mode before pasting: :set paste Then paste your code. When done, disable it: :set nopaste This works,…
Google no longer displays author information in search results the way it did when Google+ existed. However, you can still control how your content appears in search results by using schema markup—specifically the author property in JSON-LD structured data. Current best practice: schema.org markup The modern approach uses JSON-LD structured data embedded in your page’s…
GNOME Keyring stores encrypted credentials, SSH keys, and secrets for applications. If you need to disable it or start fresh after forgetting the password, you can remove the keyring database. Keyring Storage Locations The location of keyrings depends on your GNOME version and configuration: GNOME 3.0+: ~/.local/share/gnome-keyring/ or ~/.local/share/evolution/calendar/ Older GNOME: ~/.gnome2/keyrings/ XDG Base Directory…
LaTeX is a document preparation system widely used for scientific and technical documents. Most modern workflows use pdflatex or xelatex to compile directly to PDF, avoiding the outdated DVI → PostScript → PDF pipeline. Debian/Ubuntu sudo apt-get update sudo apt-get install texlive-latex-base texlive-latex-extra texlive-fonts-recommended For a complete installation with all packages: sudo apt-get install texlive-full…
Shortcut Action Ctrl+T Open new tab Ctrl+N Open new window Ctrl+Shift+N Open new Incognito window Ctrl+Shift+T Reopen last closed tab (Chrome remembers up to 10 closed tabs) Ctrl+1 through Ctrl+8 Jump to tab at specified position Ctrl+9 Jump to last tab Ctrl+Tab or Ctrl+PgDn Switch to next tab Ctrl+Shift+Tab or Ctrl+PgUp Switch to previous tab…
No-IP provides dynamic DNS service for systems that don’t have static IP addresses. The noip2 client daemon monitors your system’s IP and automatically updates your No-IP domain when changes occur. Here’s how to set it up properly. Prerequisites You’ll need: A No-IP account with at least one hostname configured Root or sudo access A Linux…