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Administration Section

Minimum installation of CentOS/Fedora/RedHat

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I have no doubt that noble lords — Linux administrators — strive to minimize the number of packages installed on the server. This is more cost-effective, safer, and instills a sense of complete control and understanding of the processes at hand for the administrator. Therefore, the typical scenario for the initial installation of the operating system involves choosing a minimal variant, which is then filled with necessary packages. However, the minimal option proposed by the CentOS installer […]

Project Salmon: How to Effectively Counter Internet Censorship with Trust Levels Proxies

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Governments in many countries impose restrictions on citizens' access to information and services on the internet. Combating such censorship is a significant and complex task. Typically, simple solutions lack high reliability or long-term effectiveness. More complex methods for circumventing blocks have downsides in terms of usability, low performance, or prevent preserving the quality of usage […]

Reversing and hacking the self-encrypting external HDD Aigo. Part 2: Taking a dump from Cypress PSoC

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This is the second and final part of the article on hacking external self-encrypting drives. I remind you that recently a colleague brought me a Patriot (Aigo) SK8671 hard drive, and I decided to reverse engineer it, and now I'm sharing what came out of it. Before reading further, make sure to check out the first part of the article. 4. Let’s start by dumping the internal flash of the PSoC 5. The ISSP protocol – […]

Fault-tolerant PostgreSQL cluster + Patroni. Implementation experience.

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In this article, I will explain how we approached the issue of PostgreSQL fault tolerance, why it became important for us, and what we ultimately achieved. We operate a high-load service: 2.5 million users worldwide, with over 50,000 active users each day. Our servers are hosted on Amazon in a single region in Ireland, with more than 100 different servers in operation at any time, nearly half of which are […]

Categories Instead of Directories, or Semantic File System for Linux

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Data classification is an interesting topic for research in itself. I love to collect information that seems necessary, and I have always tried to create logical hierarchies of directories for my files. One night I dreamt of a beautiful and user-friendly application for tagging files, which made me realize I could no longer continue the same way. The problem with hierarchical file systems is that users often encounter the issue […]

History of the internet: ARPANET — the beginning

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Other articles in the series: History of relays The "fast information transfer" method, or The birth of the relay Long-distance writer Galvanism Entrepreneurs And finally, the relay Talking telegraph Just connect Forgotten generation of relay computers Electronic era History of electronic computers Prologue Colossus ENIAC The electronic revolution History of the transistor Groping in the dark From the crucible of war Multiple reinventions History of the Internet Backbone network Dissolution, […]

The History of the Internet: Expanding Interactivity

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Other articles in the series: History of relays The "fast information transfer" method, or The birth of the relay Long-distance writer Galvanism Entrepreneurs And finally, the relay Talking telegraph Just connect Forgotten generation of relay computers Electronic era History of electronic computers Prologue Colossus ENIAC The electronic revolution History of the transistor Groping in the dark From the crucible of war Multiple reinventions History of the Internet Backbone network Dissolution, […]

Decrypting the LUKS container at system boot time

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Good day or night, everyone! This post will be useful for those who use LUKS data encryption and want to perform disk decryption under Linux (Debian, Ubuntu) during the decryption of the root partition. I couldn’t find such information on the internet. Recently, with the increasing number of disks on shelves, I encountered the problem of decrypting disks using the well-known […]

WorldSkills module Network tasks in the 'CISA' competence. Part 1 — Basic configuration

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The WorldSkills movement aims to equip participants with predominantly practical skills that are in demand in today's job market. The ‘Network and System Administration’ competency consists of three modules: Network, Windows, Linux. The tasks change from championship to championship and the conditions of execution vary, but the structure of tasks largely remains unchanged. The Network island will be the first due to its relative simplicity compared to the Linux and Windows islands. […]

Windows, PowerShell, and Long Paths

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I think you, like me, have often seen file paths such as !!! Important____New____!!! Do not delete!!! Order No. 98819-649-B dated February 30, 1985, appointing Ivan Alexandrovich Kozlov as the acting head of the department for supporting corporate VIP clients and organizing business meetings in the corridors.doc. Often, you won't be able to open such a document in Windows right away. Some practice a workaround in the form of […]

The new Windows Terminal is now available in the Microsoft Store

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The new Windows Terminal, which Microsoft announced at MS Build 2019, is now available for download in the store, according to the official blog. For those interested, the project repository is on GitHub. Terminal is a new Windows application for centralized access to PowerShell, Cmd, and Linux kernel subsystems packaged in the Windows Subsystem for Linux. The latter has become available for Windows builds […]

WSL 2 is now available in Windows Insiders.

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We’re excited to announce that starting today you can try the Windows Subsystem for Linux 2 by installing Windows build 18917 in the Insider Fast ring! In this blog post, we’ll cover how to get started, the new wsl.exe commands, and some important tips. Full documentation about WSL 2 is available on our docs page. Getting Started […]

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