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Used ASIC Miner: Risks, Verification, and Recalibrated Hashrate

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Today, one can often find cases of mining BTC and altcoins online, featuring stories about the profitable use of second-hand ASIC miners. With the surge in prices, interest in mining is making a comeback, especially as the crypto winter has left a vast number of used devices on the secondary market. For instance, in China, where electricity costs made it challenging to expect even minimal profitability from crypto mining at the beginning of the year, the secondary […]

My sixth day with Haiku: resources, icons, and packages under the hood

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TL;DR: Haiku is an operating system specifically designed for PCs, and it has several tricks that make its working environment much better than others. But how does it work? Recently, I discovered Haiku, an unexpectedly good system. I am still amazed at how smoothly it operates, especially compared to working environments on Linux. Today, I will delve into […]

Cisco 200-125 CCNA v3.0 Training Day 23. Advanced Routing Technologies

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Today, we will take a more in-depth look at some aspects of routing. Before we begin, I want to address a question from students regarding my social media pages. On the left, I've placed links to our company's pages, and on the right – links to my personal pages. I want to note that I do not add someone as a friend on Facebook unless I know them personally, so […]

How to Evaluate the Performance of a Linux Server: Open Tools for Benchmarking

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At 1cloud.ru, we have prepared a collection of tools and scripts for assessing the performance of processors, storage systems, and memory on Linux machines: Iometer, DD, vpsbench, HammerDB, and 7-Zip. Explore our other collections with benchmarks: Sysbench, UnixBench, Phoronix Test Suite, Vdbench, IOzone Interbench, Fio, Hdparm, S, and Bonnie. Photo — Bureau of Land Management Alaska — CC BY Iometer This is — […]

How to Evaluate Storage Performance on Linux: Benchmarking with Open Tools

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Last time, we talked about open-source tools for assessing processor and memory performance. Today, we will discuss benchmarks for file systems and storage systems on Linux — Interbench, Fio, Hdparm, S, and Bonnie. Photo — Daniele Levis Pelusi — Unsplash. Fio (short for Flexible I/O Tester) creates data I/O streams […]

Benchmarks for servers on Linux: a collection of open tools

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We continue to discuss tools for evaluating CPU performance on Linux machines. Today, we’ll cover: temci, uarch-bench, likwid, perf-tools, and llvm-mca. More benchmarks: Sysbench, UnixBench, Phoronix Test Suite, Vdbench, IOzone, Interbench, Fio, Hdparm, S, Bonnie, Iometer, DD, vpsbench, HammerDB, and 7-Zip. Photo — Lukas Blazek — Unsplash. temci is a tool for measuring execution time […]

Unit Tests in DBMS — How We Do It at Sportmaster, Part One

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Hello, Habr! My name is Maxim Ponomarenko, and I am a developer at Sportmaster. I have 10 years of experience in the IT field. I started my career in manual testing, then switched to database development. For the past 4 years, accumulating knowledge from both testing and development, I have been involved in test automation at the DBMS level. I have been part of the Sportmaster team for just over a year […]

Tools for application developers running in Kubernetes

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The modern approach to operation addresses many pressing business issues. Containers and orchestrators make it easy to scale projects of any complexity, streamline the release of new versions, and enhance their reliability, but they also introduce additional challenges for developers. Programmers primarily care about their code: architecture, quality, performance, elegance — rather than how it will be deployed in […]

Document collaboration system for Zimbra Open-Source Edition

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The importance of collaborative document editing in modern business cannot be overstated. The ability to draft contracts and agreements with the involvement of colleagues from the legal department, write commercial proposals under the supervision of management in real time, and so on, allows companies to save thousands of man-hours that were previously spent on numerous approvals. This is why one of the major innovations in Zextras Suite 3.0 was the introduction of Zextras […]

Not by scanning alone, or how to build a vulnerability management process in 9 steps

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On July 4th, we held a large seminar on vulnerability management. Today we publish the transcript of a presentation by Andrey Novikov from Qualys. He will discuss the steps necessary to establish a vulnerability management workflow. Spoiler: we won't get to scanning until the mid-point. Step #1: Determine the maturity level of vulnerability management processes At the very beginning, it's essential to understand at what level […]

Flow protocols as a tool for monitoring the security of the internal network

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When it comes to monitoring the security of an internal corporate or departmental network, many people associate it with controlling information leaks and implementing DLP solutions. But if we try to clarify the question and ask how you detect attacks within the internal network, the answer will typically involve mentioning intrusion detection systems (IDS). And what was once the only […].

You can now build Docker images in werf using a regular Dockerfile

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Better late than never. Or how we nearly made a serious mistake by not having support for regular Dockerfiles for building application images. This is about werf — a GitOps utility that integrates with any CI/CD system and manages the entire application lifecycle, allowing you to: build and publish images, deploy applications in Kubernetes, and remove unused images using special policies. […]

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