Linux v0.12 is a historical kernel release from the early days of Linux development. This document preserves the original release notes with minimal modifications to improve readability and accuracy. These notes are primarily of archaeological interest to those studying early Linux kernel history. Copyright The Linux copyright was updated to conform with the GNU General…
This document preserves the original release notes for Linux kernel version 0.01, the first public release by Linus Torvalds in 1991. These notes provide historical context on the early design decisions and limitations of what would become the world’s most widely used operating system kernel. Contents The 0.01 distribution included: linux-0.01.tar.Z — kernel source code…
Eclipse’s IDE capabilities make it useful for managing larger codebases, especially those version-controlled with Git. The Quick Diff feature lets you see at a glance which lines differ from your last commit—essential when reviewing your work before staging changes. Enable Quick Diff in Eclipse Open Eclipse and navigate to Window → Preferences. This opens the…
The Linux kernel includes a USB host controller driver for the Maxim MAX3421E chip, which implements a USB 2.0 full-speed and low-speed host controller over SPI. This was introduced in commit 2d53139 by David Mosberger-Tang and is maintained in the kernel’s USB subsystem. Overview The MAX3421E is a specialized chip that allows SPI-connected systems to…
Git submodules let you keep a Git repository as a subdirectory of another Git repository. When they get into a bad state—detached HEAD, local changes, merge conflicts—you need a clean reset. The complete deinit and reinit method This is the most thorough approach. It removes all submodule state and rebuilds from scratch: git submodule deinit…
RSS feed readers have become essential for staying on top of content from multiple sources. If you’re switching from Feedly to Follow.it, the migration is straightforward — both services support OPML (Outline Processor Markup Language), a standard format for exporting and importing feed lists. Export Your Feed List from Feedly Feedly makes exporting your feeds…
Linux kernel 4.19.70 is a stable release containing 95 fixes and improvements across multiple subsystems. This release addresses critical issues in audio, networking, storage, virtualization, DMA handling, and various device drivers. Major Fixes Audio and Sound ALSA USB Audio Improvements The release includes several USB audio enhancements. A quirk was added for Behringer UFX1604 to…
Accidentally pushing a tag to a remote repository happens frequently. Whether you tagged the wrong commit, used an incorrect version number, or triggered an unintended CI/CD pipeline, you need a clean way to remove it. The Basic Command Delete a remote tag using git push with the –delete flag: git push origin –delete <tagname> For…
DNF and YUM automatically download RPM packages and their dependencies during installation. If you need to build offline installation media, create local mirrors, or avoid repeated downloads across multiple systems, you’ll want to preserve those packages instead of letting them disappear from cache after installation. This is especially useful for: Building offline installation repositories Preparing…
Linux is a multi-user operating system where multiple users can run processes simultaneously. Groups provide a mechanism to efficiently manage permissions for collections of users without having to set individual permissions for each account. What are user groups? A user group is a collection of user accounts that can be assigned permissions as a unit….
Python 3.9 brought several substantial improvements over earlier versions. While it’s now past EOL as of October 2025, understanding its features provides context for migration planning and why the Python ecosystem shifted toward 3.10+. That said, if you’re maintaining legacy 3.9 code, these features remain relevant to your codebase. Dictionary Merge and Update Operators The…
Start by viewing the GRUB menu entries that will be generated during the next boot: sudo grub-mkconfig | grep -E ‘submenu |menuentry ‘ This will output something like: menuentry ‘Ubuntu’ –class ubuntu –class gnu-linux –class gnu –class os $menuentry_id_option ‘gnulinux-simple-…’ { submenu ‘Advanced options for Ubuntu’ $menuentry_id_option ‘gnulinux-advanced-…’ { menuentry ‘Ubuntu, with Linux 6.8.0-45-generic’ –class…
Hyperledger Fabric is a modular, enterprise-grade consortium blockchain platform. While its official documentation is comprehensive, deploying a test network from scratch requires configuring multiple dependencies and tools—a process that’s time-consuming for new users. This guide covers both automated and manual setup approaches to get a working Fabric network running quickly. Prerequisites You’ll need: Ubuntu 24.04…
GCC applies sophisticated optimizations to recursive functions, and recursive inlining is one of the most dramatic. When the compiler can’t use simple tail-call optimization—because a function has side effects like printf that reference stack parameters—it often unrolls multiple recursion iterations into a single function body. Understanding this behavior matters for performance tuning, debugging, and predicting…
The Dynamics 365 development tooling landscape has shifted significantly since the early VS 2017 days. While Jason Lattimer’s original D365DeveloperExtensions extension is no longer actively maintained, modern alternatives have emerged that handle web resource deployment more reliably. This guide covers current approaches and best practices for streamlining web resource workflows in Visual Studio. Modern Alternatives…
Start with the official Bash manual—it’s comprehensive and essential before writing production scripts. Access it locally with: man bash Or online at the GNU Bash Manual. The density rewards careful reading; spend time on these sections: INVOCATION: How the shell starts and behaves Quoting: When to quote and when not to Parameter Expansion: Variable manipulation,…
RHEL and CentOS 8+ ship 64-bit only by default. Some Windows applications require 32-bit Wine or run better under it. Since the distribution repositories don’t provide prebuilt 32-bit Wine, you’ll need to compile from source. The process requires building 64-bit Wine first, then 32-bit, then rebuilding 64-bit to establish proper cross-architecture linking. Install Build Dependencies…
View all virtual machines registered with VirtualBox: vboxmanage list vms Output example: “ubuntu-server” {a1b2c3d4-e5f6-7890-abcd-ef1234567890} “debian-test” {b2c3d4e5-f6a7-8901-bcde-f12345678901} “centos-prod” {d6c938d8-0bec-57f0-9fd3-8e395ba3d218} Each VM appears with its name and UUID. The UUID uniquely identifies the VM in VirtualBox’s database. List running VMs only See only active virtual machines: vboxmanage list runningvms This is useful when you have many VMs…
The StoneWall problem is a classic algorithmic challenge that tests your ability to recognize when a stack data structure enables a greedy O(N) solution. The Problem Given an array of wall heights, determine the minimum number of distinct stone blocks needed to construct that height profile. Each stone block can be placed multiple times at…
Thunderbird’s built-in calendar support (Lightning) handles local calendars, but you need two extensions to sync with Exchange Online: TbSync — manages cloud account synchronization for contacts, calendars, and tasks Provider for Exchange ActiveSync — adds ActiveSync protocol support to TbSync Install both from Thunderbird’s Add-ons Manager: Open Thunderbird and go to Menu → Add-ons and…