Fedora has evolved its hostname management over the years. Modern versions use systemd and the /etc/hostname file, while older releases relied on /etc/sysconfig/network. Here’s how to handle both scenarios. Using hostnamectl (Recommended) The most straightforward method on current Fedora is using hostnamectl, which handles hostname changes through systemd: sudo hostnamectl set-hostname newname.example.com For a hostname…
Modern iOS devices handle a wider range of video formats natively, but if you’re working with legacy formats or need specific encoding for compatibility, conversion is straightforward with ffmpeg. This guide covers converting common video formats (.wmv, .mpg, .mkv, .webm, etc.) to .mp4 format suitable for Apple devices. Installing ffmpeg On most modern Linux distributions,…
RPM Fusion provides software that the Fedora Project doesn’t ship—primarily due to licensing restrictions, patent concerns, or proprietary redistributability requirements. The repository splits into two branches: free: Open Source Software that Fedora cannot distribute due to other legal or policy reasons nonfree: Non-open source software, including proprietary drivers and restricted-use applications Enable both repositories on…
ns (Network Simulator) is a discrete-event simulator used primarily for research and educational purposes in networking. The two major versions—ns-2 and ns-3—are substantially different in architecture and usage patterns. This guide covers installation on current Fedora systems. Installing ns-2 on Fedora Note: ns-2 is legacy software and requires significant compatibility workarounds on modern systems. Consider…
Package Installation Install the required packages: dnf install nfs-utils nfs-utils includes both server and client tools. The separate rpcbind package is no longer needed on modern systems — it’s handled as a dependency and runs as part of the NFS service. Configure /etc/exports Edit /etc/exports to define which directories clients can mount and with what…
ns-2 reached end-of-life in 2011 and is no longer maintained. If you’re looking to simulate network behavior, you should use ns-3 instead, which is actively developed and provides significantly better accuracy and modern tooling. Why ns-3 Over ns-2 ns-2 was influential in academic networking research, but its architecture has fundamental limitations that became apparent over…
Every user working with Git needs an SSH key pair for authentication. Generate one if you don’t have it: ssh-keygen -t ed25519 -C “your-email@example.com” Ed25519 keys are preferred over RSA for better security and performance. The command creates ~/.ssh/id_ed25519 (private key) and ~/.ssh/id_ed25519.pub (public key). Share the public key with your Git server administrator to…
Thunderbird’s built-in compose window is functional but limited. Using Vim as an external editor gives you the full power of modal editing and your customizations for email composition. Prerequisites You need Thunderbird with the External Editor extension installed. As of 2026, this extension continues to work with current Thunderbird versions. Install it from the Thunderbird…
Flash Player reached end-of-life on December 31, 2020, and modern browsers no longer support it. However, if you’re working with legacy systems, archived content, or old web applications that still require Flash, here’s what you need to know about the historical setup and modern alternatives. The Original Setup (Historical Reference) On 64-bit Linux with Firefox,…
This post describes Xen DomU setup procedures from the early 2010s. While Xen remains critical infrastructure for cloud providers like AWS EC2 and Citrix Hypervisor, it’s rarely deployed for new on-premises virtualization projects. For modern Linux virtualization, consider: KVM/QEMU: The default hypervisor in most Linux distributions, better community support, and tighter kernel integration Proxmox VE…
IPv6 is enabled by default on most Linux distributions. While IPv6adoption has grown, many environments still rely primarily on IPv4, and disabling IPv6 can simplify networking configurations or resolve compatibility issues. Quick Method: Disable via modprobe The most straightforward approach is to prevent the IPv6 kernel module from loading: echo “options ipv6 disable=1” >> /etc/modprobe.d/disable-ipv6.conf…
Running 32-bit Firefox on a 64-bit Linux system is less common than it used to be, but there are still valid reasons: testing web compatibility across architectures, supporting legacy plugins, or working with older systems. This guide covers Fedora and RHEL-based systems, though the core approach applies to other distributions. Prerequisites Ensure you have multilib…
MPlayer reached end-of-life years ago. Its active fork, mpv, maintains all screenshot functionality with identical or simpler syntax. This guide covers mpv, which handles both single captures and burst sequences. Enable Screenshot Support Screenshot support is built into mpv by default — no filter loading required. However, you can customize behavior by adding configuration to…
Mistakes happen during development. Git provides several commands to undo changes at different stages—before committing, after committing, or in specific files. Understanding which tool to use depends on where you are in the workflow. Revert the entire working tree before committing If you’ve made changes to multiple files and want to discard everything back to…
The uptime command is the quickest way to check how long your system has been running: $ uptime 22:19:29 up 10 days, 22:26, 5 users, load average: 0.00, 0.00, 0.01 This output shows: Current time: 22:19:29 System running for: 10 days, 22 hours, 26 minutes Active user sessions: 5 Load averages: 1-minute, 5-minute, and 15-minute…
PuTTY remains a solid choice for SSH access from Windows. It’s lightweight, portable (no installation required), and handles key-based authentication well. Download the .exe version for portability. For a more modern terminal experience, Git Bash (included with Git for Windows) gives you native OpenSSH on Windows. If you’re on Windows 10+, the built-in OpenSSH client…
Connecting servers with internal IPs across multiple clusters over the internet is a common infrastructure requirement. While a traditional VPN is the standard approach, you can implement similar functionality using iptables and Network Address Translation (NAT) rules, often with lower overhead than VPN solutions. This method works by forwarding traffic between clusters at the IP…
pgrep and pkill are essential tools for finding and signaling processes by name and attributes. They’re far more precise than grepping ps output and should be your go-to for process management scripts and one-liners. pgrep: Find Process IDs pgrep searches running processes and outputs matching PIDs. All selection criteria must match unless you use alternatives…
paravirt_ops is an abstraction layer in the Linux kernel that allows the same binary to run efficiently on both bare metal and various hypervisors through runtime patching. Rather than compiling separate kernels for each platform, paravirt_ops lets the kernel detect its environment at boot and optimize itself accordingly. The Core Problem paravirt_ops Solves Traditional virtualization…
Fedora’s default font rendering can look subpar, particularly on laptops with standard LCD screens. TrueType bytecode interpreter (BCI) support significantly improves rendering quality, but licensing restrictions have kept it disabled in Fedora’s default FreeType builds. The TrueType bytecode patents expired years ago, so BCI is now safe to enable. While FreeType 2.13+ ships with BCI…