Administration Section
From September 4 to 6, a three-day Slyerm DevOps event will take place in St. Petersburg at the Selectel conference hall. We designed the program based on the idea that theoretical writings on DevOps, like manuals for tools, can be read independently. What’s interesting is experience and practice: explanations of how to do things right and wrong, and stories about how we do it. In every company, every administrator or […]
There are less than twenty-four hours left until the launch of the new AMD EPYC™ Rome processors. In this article, we decided to recall the beginnings of the rivalry between the two largest CPU manufacturers. The first commercially available 8-bit processor in the world was the Intel® i8008, released in 1972. The processor had a clock speed of 200 kHz and was manufactured using a 10 µm (10000 nm) technology. […]
The essence of the story about the most popular package manager for Kubernetes could be illustrated with emojis: a box for Helm (it's the most fitting representation from the latest Emoji release); a lock for security; and a person for problem-solving. In reality, things will be a bit more complicated, and the narrative is full of technical details on how to make Helm secure. […]
TL;DR: Haiku could become a fantastic desktop operating system with open source code. I truly want this, but there's still a lot of work to be done. I've been exploring Haiku for two days now, a surprisingly good operating system. It's the third day, and I'm enjoying this OS so much that I constantly think about how to make it a daily operating system. In terms of […]
In June and July, nearly twenty companies approached us inquiring about the capabilities of virtual GPUs. One of the major subsidiaries of Sberbank is already using Cloud4Y's 'Graphics', but overall, the service isn't particularly popular. So, this level of interest has pleased us greatly. Noticing the rising interest in the technology, we decided to provide a bit more detail about vGPU. The 'data lakes' obtained from scientific […]
Hello everyone. We are sharing the translation of the final part of an article prepared specifically for students of the 'Data Engineer' course. The first part can be found here. Apache Beam and DataFlow for real-time pipelines Setting up Google Cloud Note: To run the pipeline and publish the custom log data, I used Google Cloud Shell, as I encountered issues running the pipeline in Python […]
The need to provide remote access to corporate environments is becoming increasingly common, whether it’s for internal users or partners who require access to certain servers in your organization. To meet these needs, most companies use VPN technology, which has proven to be a securely protected method for granting access to an organization's local resources. My company did not become […]
Today, I want to share how to set up a two-factor authentication server to protect corporate networks, websites, services, and SSH. The server will run a combination of LinOTP and FreeRadius. Why do we need this? It is a completely free and convenient solution that operates within your own network, independent of third-party providers. This service is quite user-friendly and visually clear, unlike other open-source products, and it also supports […]
A pair of devices from the Russian developer "Kroks" has arrived for an independent test review. These are quite compact radio frequency measurement devices, specifically: a spectrum analyzer with a built-in signal generator, and a vector network analyzer (reflectometer). Both devices have a frequency range of up to 6.2 GHz. There is interest in understanding whether these are just pocket-sized "meters" (toys), or truly noteworthy instruments, as the manufacturer positions them: […]
Geoff Huston, chief researcher engineer at the internet registrar APNIC, predicted that IPv4 addresses would run out by 2020. In this new series of materials, we will refresh information about how the addresses were depleted, who still has them, and why this happened. / Unsplash / Loïc Mermilliod Why Addresses Are Running Out Before delving into the story of how the pool was 'drying out' […]
When people hear the word 'cryptography,' some might think of their WiFi password, the green padlock next to their favorite website's address, and how difficult it is to access someone else's email. Others might recall the series of vulnerabilities from recent years with alarming abbreviations (DROWN, FREAK, POODLE…) and stylish logos, accompanied by urgent warnings to update their browser. Cryptography encompasses all of this, but the essence lies elsewhere. It resides in the delicate balance between […]
This is a completely useless, impractical, yet amusing little post about directories in *nix systems. It’s Friday after all. During interviews, boring questions about inodes and everything-is-a-file often arise, which few can answer sensibly. But if you dig a little deeper, you can find some interesting things. To understand the post, here are a few points: everything is a file. A directory is also […]