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For months, I’ve been running OpenClaw — a personal AI assistant integrated with Telegram that monitors my crypto portfolio and handles daily tasks. Initially, I used Anthropic’s Claude Sonnet, but the recurring costs add up fast for a 24/7 agent. OpenRouter’s free tier provides access to capable open-source models like Qwen and Llama at zero…
Paxos and Raft are foundational consensus algorithms for distributed systems. Both solve the same core problem — achieving agreement across multiple nodes despite failures — but take fundamentally different approaches. Paxos Paxos operates around three distinct roles: Proposers submit values Acceptors store and respond to requests Learners observe the final decision The algorithm proceeds in…
Paxos is a fundamental consensus algorithm for distributed systems that guarantees agreement on a single value even when nodes fail or messages are delayed. Developed by Leslie Lamport in 1998, it remains a cornerstone for building fault-tolerant distributed systems where strong consistency is required. The Core Problem In a distributed system, you need multiple independent…
Raft is a consensus algorithm designed to be more understandable than alternatives like Paxos. It ensures a cluster of servers can agree on system state even when some nodes fail. The core insight is breaking consensus into independent, manageable subproblems rather than treating it as one complex whole. Core Subproblems Raft splits consensus into three…
In many Linux desktop environments (especially GNOME), the Super + . (Windows key + period) shortcut is used to open the Emoji picker. While useful for some, it can interfere with gaming, terminal workflows, or other custom keybindings. Disabling the Emoji Hotkey The cleanest approach is using gsettings, which manipulates the underlying dconf database without…
Zlib is a critical compression library used across the Linux ecosystem. You’ll need it for compiling software from source, as it’s a dependency for git, libpng, openssl, and countless other tools. If you’ve hit a “zlib.h: No such file or directory” error during compilation, this is what you need. Quick Install sudo apt update sudo…
GNOME 3 and later versions include built-in screenshot functionality accessible via keyboard shortcuts. These work without opening any application, making them faster than the dedicated Screenshot utility. The shortcuts split into two categories: saving directly to the Pictures folder, and copying to the clipboard for immediate pasting. Save screenshots as files These shortcuts save to…
Linux kernel 4.19.178 is a stable release from the 4.19 LTS series, containing 248 patches addressing security fixes, memory leaks, and driver corrections. This release modified approximately 239,909 lines of source code compared to the base 4.19 release. Device Tree and Architecture Fixes Several ARM and ARM64 device tree updates improve hardware support and thermal…
Linux kernel 4.14.223 is a stable release in the long-term support (LTS) 4.14 series. This patch version includes 176 changes and bug fixes across 277,921 lines of code modifications compared to the base 4.14 release. Where to Get the Code The source code is available from the linux-stable tree with the linux-4.14.223 tag. You can…
This post covers the changes, bugfixes, and new features in Linux kernel 5.4.102. The release includes 338 patches totaling approximately 160,715 lines of changed or added source code compared to the 5.4 baseline. You can find the source code in the linux-stable tree, or download the 5.4.102 release package directly. The patch bundle is also…
The Linux 4.9.60 stable release was published on November 2, 2017, introducing 24 fixes and improvements across 64,224 lines of code changes compared to the 4.9 baseline. This point release addresses critical security vulnerabilities, buffer overrun issues, and device driver fixes that affected several subsystems. You can find the source code in the linux-stable tree…
The xt_quota netfilter module reports quota values back to userspace for tools like iptables-save and rule management. A critical kernel patch changed how these values are communicated to ensure proper handling of quota rule removal and persistence. The Problem Originally, the xt_quota module copied the current quota value back to userspace after each packet match….
ODT files often contain formatting that you don’t need. Whether you’re archiving content, preparing text for further processing, or just need readability without markup, converting to plain text is straightforward. Here are the practical approaches and their tradeoffs. LibreOffice Conversion LibreOffice’s –convert-to flag handles ODT natively: libreoffice –headless –convert-to txt input.odt The –headless flag prevents…
LibreOffice is the most reliable tool for command-line document conversion, offering robust support for Microsoft Office formats. Install it on Ubuntu/Debian/Linux Mint: sudo apt install libreoffice On Fedora/RHEL systems: sudo dnf install libreoffice For minimal headless-only installations without GUI dependencies: sudo apt install libreoffice-writer libreoffice-calc libreoffice-impress Converting .docx/.doc to .odt LibreOffice runs in headless mode…
Hex-encoded strings are common in system administration, debugging, and network packet analysis. Whether you’re examining binary data, decoding network protocols, or troubleshooting data encoding issues, you’ll often need to convert between hex and ASCII representations. xxd is the standard tool for this task on Unix-like systems. It creates hexdumps and reverses them back to binary…
This document provides the essential software versions and upgrade instructions for running Linux 2.0.x kernels successfully. It covers package compatibility, known issues, and practical solutions for system administrators upgrading from earlier kernel releases. Networking Configuration The loopback route configuration in many older network scripts is incorrect and will cause kernel errors in 2.0.x. Look for…
This document preserves the original Linux 1.0 release notes (source: linux-1.0.tar.gz), released in March 1994. It’s a snapshot of early Linux kernel development and shows the rapid pace of improvement during the pre-1.0 era. The original ASCII formatted version appears at the end of this post. Changes since 0.99 patchlevel 15 Removed all the bugs,…