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Cheat sheet for system administrators on SELinux: 42 answers to important questions

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This article has been translated specifically for students of the 'Linux Administrator' course. Here you will find answers to important questions about life, the universe, and everything in Linux with enhanced security. 'The important truth that things are not always what they seem is well known...' — Douglas Adams, The Hitchhiker's Guide to the Galaxy. Security. Reliability. Compliance. The Four Horsemen of the SysAdmin Apocalypse. In addition to...

HighLoad++, Evgeny Kuzovlev (EcommPay IT): what to do when a minute of downtime costs $100,000

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Everyone talks about the processes of development and testing, staff training, and motivation enhancement, but these processes are insufficient when a minute of service downtime costs astronomical sums. What do you do when you're conducting financial transactions under a strict SLA? How can you improve the reliability and fault tolerance of your systems, excluding development and testing? The next HighLoad++ conference will take place on April 6 and 7, 2020.

GameMode 1.5 is available, a game performance optimizer for Linux

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Feral Interactive has released version 1.5 of the GameMode optimizer, implemented as a background process that dynamically changes various Linux system settings to achieve maximum performance for gaming applications. The project’s code is written in C and is distributed under the BSD license. A special library, libgamemode, is provided for games, allowing specific optimizations to be enabled during gameplay.

Release of GhostBSD 20.01

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The desktop-oriented distribution GhostBSD 20.01, based on the TrueOS platform, is now available, offering the MATE desktop environment. GhostBSD uses OpenRC as the default initialization system and ZFS as its file system. It supports both live mode operation and installation on a hard disk (utilizing its own ginstall installer written in Python). Bootable images are available for the x86_64 architecture (2.2 GB).

Intel has released the OSPRay 2.0 distributed ray tracing engine

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Intel has introduced a significant release of the scalable 3D rendering engine OSPRay 2.0, designed for realistic high-quality visualization using ray tracing, suitable for interactive applications. The engine is being developed as part of the larger Intel Rendering Framework project, aimed at creating software visualization tools for scientific calculations (SDVis), which include the Embree ray tracing library, the photorealistic rendering system GLuRay, […]

Ayar Labs has introduced the TeraPHY optical chiplet transceiver.

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Developments in hybrid electronics that combine traditional and optical technologies have been underway for a long time. The startup Ayar Labs and its innovations have been known since 2015. Now, the company is ready to launch a serial product, which was detailed in WikiChip Fuse. Ayar Labs is focusing on creating an optical interconnect system to replace current SerDes technologies. The first […]

CRM 2020

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The IT sector is thankless, and forecasts are as dependable as last summer's weather; you'll either freeze, get soaked, or suffer a sunstroke. However, our predictions for 2019 turned out well, so we decided to discuss the CRM trends for 2020 as we see them for small and medium-sized businesses. We have […]

Complex, vulnerable, misconfigured: Cyber threats of 2020.

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Technologies are evolving and becoming more complex year by year, and along with them, attack methodologies are improving. The current realities demand online applications, cloud services, and virtualization platforms, so it's no longer sufficient to hide behind a corporate firewall and avoid venturing into the 'dangerous internet.' All of this, coupled with the proliferation of IoT/IIoT, the growth of fintech, and the increasing popularity of remote work, has drastically […]

Office plankton — an evolution

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Work — home, work — home, and that’s every day. They say life is a great adventure, but in the monotony of days, you don't even feel alive. This led to reflections on the theme of 'Is there a meaningful life in the realm of office plankton?' and the conclusion was — perhaps, provided each unicellular strives to perform its duties […]

Nginx-log-collector is a utility from Avito for sending nginx logs to Clickhouse

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This article will discuss the nginx-log-collector project, which will read nginx logs and send them to a Clickhouse cluster. Typically, ElasticSearch is used for logs. Clickhouse requires fewer resources (disk space, RAM, CPU). Clickhouse writes data faster. Clickhouse compresses data, making the data on disk even more compact. The advantages of Clickhouse are evident in the two slides from the presentation How VK […]

Zero Downtime Deployment and databases

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This article explains in detail how to address database compatibility issues during deployment. We will discuss what can happen to your production applications if you attempt a deployment without prior preparation. Then we will go through the application lifecycle stages necessary to achieve zero downtime. As a result […]

Web service monitoring bot in half an hour: telegram + bash + cron

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Sometimes, you need to quickly set up monitoring for a new service, but there's no ready infrastructure or expertise at hand. In this guide, we will implement a tool for monitoring any web services in just half an hour, using only the built-in tools of Ubuntu: bash, cron, and curl. For delivering notifications, we will use Telegram. The 'cherry on top' will be the emotional engagement of users. Tested on real people — it works. When we […]

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