GNOME’s default Settings app doesn’t expose comprehensive font options, but GNOME Tweaks and command-line tools give you full control over typefaces across the desktop, shell, and window decorations. Installing GNOME Tweaks GNOME Tweaks is the easiest way to customize fonts. Install it on your system: Fedora: sudo dnf install gnome-tweaks Debian/Ubuntu: sudo apt install gnome-tweaks…
Vim remains one of the most efficient editors available on Linux and Unix systems. While it has a steep learning curve, the payoff in speed and capability is substantial once you develop muscle memory. This guide covers practical configuration strategies, essential keybindings, and workflow improvements that actually matter in daily use. Setting up your configuration…
Benchmarks exist to answer one question: how fast can this system process data? The AMPLab Big Data Benchmark, developed by UC Berkeley, became a foundational effort to answer that question systematically across different distributed query engines. The Benchmark’s Original Scope The AMPLab benchmark evaluated five systems circa 2013: Redshift – Amazon’s columnar data warehouse (built…
Sending email notifications when commits are pushed to a central Git repository helps teams stay coordinated and maintains audit trails. This is handled through Git hooks—scripts triggered by repository events. How Post-Receive Hooks Work When a client pushes to your Git server, the post-receive hook executes automatically. This hook lives at GIT_DIR/hooks/post-receive in your bare…
Gitolite provides fine-grained access control over Git repositories without the overhead of a full-featured platform. It uses SSH keys for authentication and handles per-user, per-repository, and even per-branch permissions through a simple configuration file. This guide covers a working installation on modern Linux distributions. Prerequisites Server: Linux (Ubuntu 20.04 LTS or later, Debian 11+, RHEL/Rocky…
Resource management and error handling are critical in systems programming. RAII (Resource Acquisition Is Initialization) originated in C++ and ties resource lifecycles to object scope, with destructors automatically cleaning up resources. C lacks destructors and exceptions, but you can achieve similar semantics using established patterns that are battle-tested in production systems. The goto-based cleanup pattern…
Fedora is a cutting-edge distribution sponsored by Red Hat that serves as a testing ground for technologies eventually stabilized in RHEL. This guide covers essential infrastructure, system administration, and desktop tools for modern Fedora systems, with practical installation and usage examples. Desktop Environment Setup GNOME Configuration Modern GNOME desktops (GNOME 40+) use dconf for configuration,…
VNC provides graphical remote access to Linux servers. For security, tunnel VNC traffic through SSH rather than expose it directly to the network. This guide covers Windows client setup with SSH tunneling. Prerequisites Windows client: SSH client: Native OpenSSH (built into Windows 10/11) or PuTTY VNC viewer: RealVNC Viewer, TigerVNC Viewer, or TightVNC Viewer Linux…
Self-hosting a photo gallery gives you control over your content. If you want to skip database management entirely, a handful of PHP solutions still work—though most are unmaintained. This post covers what’s still functional, where the limits are, and when you should choose something else instead. Static File-Based Gallery Scripts Single File PHP Gallery Status:…
Choosing the right cloud storage service requires understanding how each platform handles data consistency. This post covers the current consistency guarantees from the three major providers and how they affect your application design. Amazon S3 S3 is a key-based object store built for Internet-scale workloads. The consistency model is now straightforward across all operations. S3…
Static linking embeds all library code directly into your binary. On Linux, this sounds straightforward but glibc introduces complications that pure static binaries don’t truly exist — the C library still loads dynamic features at runtime like NSS (Name Service Switch), locale data, and character set converters. Understanding these constraints is essential before committing to…
Vim’s default OCaml indentation is mediocre at best. The ocp-indent tool provides intelligent, syntax-aware indentation that respects OCaml conventions and integrates cleanly with Vim and Neovim. Installing ocp-indent Install via opam: opam install ocp-indent This installs the indentation engine and Vim plugin support. Verify the installation: which ocp-indent Configuring Vim Add this to your ~/.vimrc…
RAID0 (striping) on enterprise RAID controllers like Broadcom MegaRAID is used to expose multiple disks as a single logical volume with no redundancy. This configuration is appropriate only for performance-critical workloads where data loss from a single disk failure is acceptable, or for temporary/cache storage. This guide covers the full setup process on servers with…
Linux device names like /dev/sda and /dev/sdb are unreliable identifiers for physical hardware. They shift when you add, remove, or reseat drives, and there’s no guaranteed mapping between a SATA port and its device name. When a disk fails, you need to know exactly which physical slot to replace—guessing wrong takes down the wrong system….
mailx (heirloom-mailx) and s-nail are lightweight CLI tools for sending email from scripts, cron jobs, and system alerts. They’re especially useful in corporate or campus networks with internal SMTP servers that don’t require authentication. Installation Debian/Ubuntu: apt install heirloom-mailx RHEL/CentOS/Fedora: dnf install mailx Alpine: apk add mailx Arch: pacman -S s-nail s-nail is a modern…
NFSv3 uses multiple RPC services, each requiring its own port assignment. Without explicit configuration, rpcbind assigns random high ports to four critical services, making firewall rules unmaintainable. Modern deployments should prioritize NFSv4 with Kerberos, but legacy NFSv3 environments remain common enough to warrant proper port management. The NFS service stack includes seven RPC programs: Service…
SSH port forwarding lets you tunnel network traffic through an encrypted connection, making it essential for accessing services on restricted networks, exposing local services safely, or routing traffic through a jump host. This guide covers the three main types and production-ready practices. Local Forwarding Local forwarding listens on your local machine and relays connections through…
The proprietary fglrx driver reached end-of-life in 2015 and is incompatible with current Fedora releases. For modern AMD GPUs, use AMDGPU—AMD’s actively maintained open-source driver that supports Wayland, current kernel versions, and both desktop and compute workloads. GPU Compatibility RDNA and newer (RX 5000 series and later): AMDGPU is required and fully supported. GCN-era Radeons…
Xen remains in production use at scale across AWS EC2, Citrix Hypervisor, and various cloud providers, though KVM has become the default hypervisor for most Linux distributions. If you’re operating a Xen environment, Dom0 resource management is critical to system stability. Why Dom0 Resource Management Matters Dom0 performance directly affects your entire virtualized infrastructure. Since…
This guide sets up OpenLDAP for centralized authentication and NFS with automount to provide unified home directories across a cluster. The setup uses modern OpenLDAP backends and current NFS4 best practices. System Environment Server: LDAP and NFS: 10.0.0.2, Fedora 41 x86_64 Base DN: dc=lgcpu1 Clients: Range: 10.0.0.1/24, Fedora 41 x86_64 LDAP Server Setup Package Installation…