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A few years ago, a new profession called DevOps engineer emerged in IT. It quickly became one of the most popular and sought-after roles in the market. However, there is a paradox — the popularity of DevOps is partly due to the fact that companies hiring such specialists often confuse them with other professions. This article discusses the nuances of the DevOps profession, the current state of the market, and […]
The text output of commands in the PowerShell interpreter window is merely a way to display information in a human-readable format. In reality, the environment is object-oriented: cmdlets and functions receive input and return output in the form of objects, and the variable types available in both interactive mode and scripts are based on .NET classes. In the fourth […]
Any cloud provider offers data storage services. These can include cold and hot storage, Ice-cold, etc. Storing information in the cloud is quite convenient. But how were data stored 10, 20, or 50 years ago? Cloud4Y has translated an interesting article that talks precisely about this. Data can be stored in various ways, as new methods keep emerging, […]
In most cases when working with responses received from an API, or with any other data that has a complex tree structure, you encounter JSON and XML formats. These formats have many advantages: they store data quite compactly and help avoid excessive information duplication. A downside of these formats is the complexity of processing and analysis. Unstructured data is impossible […]
The tidyr package is part of one of the most popular libraries in R — tidyverse. The main purpose of the package is to tidy up data. There is already a publication on Habr dedicated to this package, but it dates back to 2015. I want to discuss the most relevant changes announced a few days ago by its author, Hadley Wickham. […]
The purpose of this article is to simplify the setup of the DHCP service for the VXLAN BGP EVPN and DFA factory using Microsoft Windows Server 2016/2019. According to official documentation, the DHCP service based on Microsoft Windows Server 2012 for the factory is configured as a SuperScope, containing a Loopback pool (in this pool, the highlight is the exclusion of all IP addresses from the pool (excluded IP […
In the organization where I work, remote work was generally prohibited. Until last week. Now, we had to urgently implement a solution. From the business side — adapting processes to the new work format, from us — PKI with PIN codes and tokens, VPN, detailed logging, and much more. Additionally, I was involved in setting up the remote desktop infrastructure aka […
Overview of the 12-port smart managed gigabit PoE switch Zyxel GS1350-12HP with gigabit uplink and a price of 21,799 rubles. Anyone who looks under the cut risks getting it absolutely free. About Zyxel A publicly traded company headquartered in Taiwan, specializing in the production of networking equipment for home and business since 1989. Its shares are traded on the Taiwan Stock Exchange. It has a representative office in […]
This is the beginning of an extensive course on mail server operations. I am not aiming to teach anyone how to work with mail servers quickly. There will be a lot of additional information related to the topics we will encounter along the way, as I strive to create the course mainly for those who are just taking their first steps. Preface It so happens that I work part-time as an instructor for […]
Since the previous article was well received, it would be wrong not to share additional utilities that I still use today. I want to clarify that this article is adapted for beginners, and seasoned Linux users may need to be patient with some of the explanations. Let's dive into the topic! A Preface for Beginners It’s worth starting with which distribution you are using. […]
A little about console utilities that few people know about, but which can be useful for both a novice junior and a seasoned senior. Why it is worth writing about this Writing about utilities (primarily console ones) is important because I see so many people not utilizing the power of the console to its full extent. Many limit themselves to simply creating files, while […]
According to Verizon, most (87%) cybersecurity incidents occur within minutes, while 68% of companies take months to detect them. This is also confirmed by a Ponemon Institute study, indicating that most organizations spend an average of 206 days detecting an incident. In our investigations, hackers can control a company's infrastructure for years without being detected. For example, in one […]