This post documents jailbreaking procedures for legacy iOS devices (iPod Touch, early iPhone) using Spirit—an untethered jailbreak tool from the late 2000s. Modern iOS devices (2010 and later) use entirely different security models and jailbreak methods. This information is preserved for historical reference only and has no practical application to current iOS versions. About Spirit…
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…
Understanding and managing system time is crucial for logging, cron jobs, SSL certificates, and system synchronization. Here’s how to handle it properly on modern Linux systems. Unix Time (POSIX Time) Unix time represents seconds elapsed since 00:00:00 UTC on January 1, 1970, excluding leap seconds. Get the current Unix timestamp: $ date +%s 1735689600 This…
MAC stands for Media Access Control — a six-byte identifier (usually written as twelve hexadecimal digits) that uniquely identifies a network interface on a LAN. The Address Resolution Protocol (ARP) maps IP addresses to MAC addresses at layer 2. You might need to change your MAC address to: Bypass network access controls tied to MAC…
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…
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…
Xen remains a production hypervisor for enterprise deployments (AWS EC2, Citrix Hypervisor), though KVM has become the default for most Linux distributions. If you’re deploying Xen in 2026, you’ll likely be working with recent stable releases rather than the legacy versions covered in older guides. This guide covers building a modern Xen Dom0 environment on…
rsync is a reliable choice for backing up your Linux home directory, especially when dealing with large files and incremental changes. Unlike git (which struggles with files >5GB), rsync efficiently handles large files and only transfers what’s changed on subsequent runs. Basic Backup Command The fundamental syntax is straightforward: rsync -avxP \ /path/to/directory/to/backup \ /path/to/directory/for/storing/backup…
ffmpeg is the de facto tool for desktop recording on Linux. It can capture your X11 or Wayland display and encode directly to MP4, WebM, or other formats without requiring intermediate files. Basic X11 Screen Capture For X11-based desktops (KDE Plasma, XFCE, i3, etc.), use the x11grab input device: ffmpeg -f x11grab -s 1920×1080 -r…
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…
Guake is a drop-down terminal emulator for GNOME that brings the Quake-style console experience to Linux desktops. When you press a hotkey (F12 by default), a terminal slides down from the top of the screen. Press it again and it retracts. It’s fast, minimal, and designed purely around keyboard efficiency. Installation On Fedora/RHEL-based systems: sudo…
A SOCKS5 proxy tunneled through SSH provides encrypted communication between your client and a remote server. This is useful for bypassing network restrictions, securing connections on untrusted networks, or routing traffic through a trusted server. Basic Setup The simplest approach uses SSH’s dynamic port forwarding with the -D flag: ssh -D 8080 username@sshd_server This creates…
Xen remains in production use (AWS EC2, Citrix Hypervisor), though KVM has become the standard Linux hypervisor. This guide covers automating backups for file-backed Xen virtual machines. The approach adapts to other hypervisors like KVM with minimal modification. Architecture and Prerequisites The backup system assumes: Virtual machines stored in /lhome/xen/ with individual directories per VM…
When you need to start long-running commands while continuing to work in the shell, run them in the background. Bash and other modern shells maintain a job list and allow you to switch jobs between foreground and background execution. Only one job can run in the foreground at a time. Starting a Background Job Append…
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…