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Understand Linux logging system and Job Control
Linux system administration is the process of managing and maintaining the core components of a Linux operating system. This includes controlling services (also called daemons), managing system processes, configuring startup behavior, and understanding how the system boots. Whether you are working on a server, a desktop, or a virtual machine, these tasks are central to […]
Understand netstat and ss commands on Linux
The netstat and ss commands in Linux are used to view open ports, active connections, and socket statistics on your system. These tools help system administrators monitor network activity, detect unauthorized access, and troubleshoot services that rely on network communication. While netstat is a traditional utility, ss is its faster and more modern replacement. Alongside […]
Understand Networking on Linux: Ipconfig and DNS configuration
Networking is a core part of Linux system administration. Whether you are setting up a server, connecting to the internet, or troubleshooting issues, knowing how to configure and test network settings is essential. Linux provides powerful command-line tools to help you manage IP addresses, test connectivity, and control how your system interacts with the network. […]
Learn Shell Scripting basics and Cron jobs
Shell scripting is one of the most powerful skills in Linux. It allows you to automate tasks, manage systems efficiently, and handle repetitive work with ease. Whether you want to schedule backups, process files in bulk, or set up system monitoring, shell scripts can save time and reduce errors. On Linux, the most common shell […]
Package Management on Linux: A guide
Linux software and package management is the process of installing, updating, removing, and maintaining software on your system using package managers. Unlike Windows or macOS where software is often downloaded from websites, Linux uses structured systems called repositories. These are trusted sources that store pre-built software packages. Each Linux distribution comes with its own default […]
Managing Users, Groups, and Permissions in Linux
Linux is built from the ground up to be a multi-user operating system. Whether you are using it on a desktop, running it on a server, or managing a development environment, there will be situations where more than one user needs access to the system. To manage this securely, Linux uses a permission system based […]
A limited-time flavor: Blue Raspberry Pi
A limited-time flavor: Blue Raspberry Pi
The most unique Raspberry Pi I own is a limited-time flavor: blue raspberry. And no, this isn't the Brazilian version, or the red Chinese version. This blue version is one of 1000 blue Pis that were made to celebrate Raspberry Pi's first anniversary, 12 years ago.
Jeff Geerling May 30, 2025TIG сварка в домашней мастерской, начало. Обзор, подборка мелочей. Часть 1
TIG сварка, она же «аргоновая», кроме общеизвестных достоинств, ещё и сравнительно сложно устроена, оперирует целым рядом факторов — область технического бытия насколько полезная, настолько же и разнообразно-увлекательная. Первые же опыты породили длинный ряд мелких вопросов, ради ответов на которые пришлось здорово порыться. Внимаю почтенной публики — эти, несколько систематизированные полезные практические мелочи. Добавим сюда и ценные замечания-указания от благосклонных читателей [1], да простят они меня — без указания авторства. Сварочное дело рассматриваем в его домашнем, любительском преломлении. Читать дальше →
Цифровые домофоны. Гость из Польши в российских подъездах
Приветствую всех!
Уверен, эти девайсы знакомы многим из вас. Даже если вы не живёте в Москве или Питере, где расположена большая их часть, вероятность, что в вашем городе есть хотя бы один такой экземпляр, весьма высока. В своё время их ставили повсеместно: от «элитных» жилых комплексов до простых панельных пятиэтажек. И, конечно же, я никак не мог обойти их вниманием. Сложно найти ряд насколько разных, настолько же и идентичных между собой домофонов.
Сейчас мы поговорим об этих, казалось бы, простых, но на деле скрывающих много примечательного штуках. Увидим много интересного от Arduino в продакшне до бэкдоров и секретных кодов, заставим работать...
Name that Ware, May 2025
The Ware for May 2025 is shown below.
Because I really like to be able to read the part numbers on all the parts, here’s a couple more detail images of portions that didn’t photograph clearly in the above images.
This ware was donated to me by someone in person, but unfortunately the post-it note I had put on it to remind me who it was had long fallen off. My apologies; if you happen to see this, feel free to pop a note in the comments so you can be attributed for the contribution.
I made a point of not looking up...