1. Introduction to DRBD

    Posted on in system_administration

    DRBD, which stands for Distributed Replicated Block Device, is a software-based, shared-nothing, replicated storage solution for mirroring the content of block devices (such as hard disks, partitions, logical volumes, etc.) between servers. It is often used to build high-availability (HA) clusters and is integrated into the Linux kernel, making it …

  2. Implementing Real-Time Location Tracking with WebSockets and GPS Data in Modern Web Applications

    Posted on in programming

    Introduction to Real-Time Tracking

    Real-time location tracking has become increasingly critical in modern web applications, especially in industries such as logistics, transportation, and personal safety. This functionality allows users to track the movement of objects or individuals live, providing significant value in applications like delivery services, fleet management, and personal …

  3. Understanding WebSockets: A Deep Dive

    Posted on in programming

    In the world of web development, real-time communication has become increasingly crucial. From live chat applications and online gaming to real-time data streaming and collaborative editing tools, the demand for instantaneous data exchange between clients and servers has surged. WebSockets, a powerful protocol introduced to address this need, enable full-duplex …

  4. Convert milliarcseconds to degrees

    Posted on in programming

    Milliarcseconds (mas) are a precise angular measurement unit used in astronomy and geodesy, critical for high-precision GPS software. Understanding how to handle milliarcseconds and convert them to degrees is essential for integrating GPS data with applications like Google Maps.

    Understanding Milliarcseconds

    An arcsecond (arcsec) is 1/3600 of a degree …

  5. FreeBSD TCP Performance Tuning

    Posted on in system_administration

    To enable RFC 1323 Window Scaling and increase the TCP window size to 1 MB on FreeBSD, add the following lines to /etc/sysctl.conf and reboot.


    You can make these …

  6. Algorithms For TCP Congestion Control

    Posted on in system_administration

    Note: Although this is a continuation of the TCP Performance Tuning article series, it's also valuable as a standalone reference.

    This list includes a mix of both well-established and newer algorithms, reflecting the ongoing advancements in TCP congestion control research and deployment. Algorithms like CUBIC and BBR are particularly notable …

  7. Quick and Efficient Subversion Repository Setup with SSH

    Posted on in software

    Setting up a Subversion (SVN) repository can be streamlined by using SSH, especially when developers already have system accounts. This method bypasses the complexity of setting up WebDAV with Apache.

    Steps to Set Up Subversion with SSH

    1. Create the Repository:

      sudo svnadmin create /var/svn

      This command initializes a new …

  8. Utilizing Cisco IP Cache Flow to Identify Abusive Hosts

    Posted on in networking

    As a network engineer, identifying and mitigating network abuse is a critical task. Cisco's IP cache flow tools can help you detect hosts responsible for generating high volumes of traffic, which is often indicative of abusive behavior such as Denial of Service (DoS) attacks. Here’s an updated guide to …

  9. Filtering Queries in Django Templates

    Posted on in programming

    When developing Django applications, you often need to filter and display query results dynamically within your templates. This can involve anything from simple lookups to complex filtering based on multiple conditions. This article provides an in-depth guide on various methods for filtering queries directly within Django templates.

    Understanding the Basics …

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