Author: Yuri Gagarin

"Walking in my shoes" — wait, are they branded?

Since 2019, a law on mandatory labeling has been in effect in Russia. The law does not apply to all groups of goods, and the timelines for mandatory labeling vary for different product groups. The first items to fall under mandatory labeling will be tobacco, footwear, and pharmaceuticals, with additional products, such as perfumes, textiles, and milk, to be added later. This legislative innovation has prompted the development of new IT solutions that will allow […]

Setting up DRBD for storage replication on two CentOS 7 servers

The translation of the article has been prepared in anticipation of the start of the course “Linux Administrator. Virtualization and Clustering.” DRBD (Distributed Replicated Block Device) is a distributed, flexible, and universally replicable data storage solution for Linux. It mirrors the contents of block devices such as hard drives, partitions, logical volumes, etc., between servers. It creates copies of data on […]

Cloud access control systems — PROS and CONS firsthand

The pandemic has forced each of us, without exception, to acknowledge that the internet is predominantly an information medium and also a vital life support system. After all, many people today are literally fed, clothed, and educated by the internet. The internet is infiltrating our homes, settling in teapots, vacuum cleaners, and refrigerators. IoT, or the Internet of Things, refers to any equipment, such as household appliances, in […]

Release of Clonezilla Live 2.6.7

The release of the Linux distribution Clonezilla Live 2.6.7 is available, designed for quick disk cloning (only the used blocks are copied). The tasks performed by the distribution are similar to those of the proprietary product Norton Ghost. The size of the distribution's ISO image is 277 MB (i686, amd64). The distribution is based on Debian GNU/Linux and utilizes code from projects such as DRBL, Partition Image, ntfsclone, partclone, udpcast. Booting from […]

Tips and recommendations for transforming unstructured data from logs into ELK Stack using GROK in LogStash

Structuring Unstructured Data with GROK If you are using the Elastic (ELK) stack and are interested in mapping user logs from Logstash to Elasticsearch, then this post is for you. The ELK stack is an acronym for three open-source projects: Elasticsearch, Logstash, and Kibana. Together, they form a log management platform. Elasticsearch is a search and analytics system. […]

Building a server for graphic and CAD/CAM applications for remote work via RDP based on used CISCO UCS-C220 M3 v2

Almost every company now has a department or a group working with CAD/CAM or heavy design programs. This user group shares serious hardware requirements: a lot of memory—64GB or more, a professional graphics card, a fast SSD, and reliability. Often, companies buy a few powerful PCs (or graphic stations) for some users in these departments while others get less […]

Hosting the website on a home router

I have long wanted to 'touch' internet services by setting up a web server from scratch and launching it online. In this article, I want to share the experience of transforming a home router from a narrow-function device into a practically full-fledged server. It all started when my trusty TP-Link TL-WR1043ND router stopped meeting the needs of my home network; I craved the 5GHz band and faster access […]

Linus Torvalds on the issues of finding maintainers, Rust, and workflows

At the virtual conference 'Open Source Summit and Embedded Linux' held last week, Linus Torvalds discussed the present and future of the Linux kernel in an opening talk with Dirk Hohndel from VMware. During the discussion, the topic of generational change among developers was addressed. Linus pointed out that despite the project's nearly 30-year history, in general, the community […]

Dismantling EncroChat

Recently, Europol, NCA, the National Gendarmerie of France, and a joint investigative team formed with the participation of France and the Netherlands conducted a joint operation aimed at compromising the EncroChat servers by 'installing technical devices' on the servers in France(1) to facilitate the 'calculation and identification of criminals through the analysis of millions of messages and hundreds of thousands of images.'(2) Some time after the operation, […]

From a 'startup' to thousands of servers across a dozen data centers. How we pursued growth in our Linux infrastructure.

If your IT infrastructure is growing too quickly, you will sooner or later face the choice of either incrementally increasing human resources to support it or starting automation. For a while, we lived in the former paradigm, and then the long journey towards Infrastructure-as-Code began. Of course, NSPK is not a startup, but such an atmosphere prevailed in the company during its early years, […]

Data Center Air Corridor Isolation Systems. Part 2. Cold and Hot Corridors. Which one do we isolate?

There are two installation options for a containerization system in an already operational machine hall (I will discuss the installation of isolation systems in construction machine halls in the next part). In the first case, we isolate the cold corridor, and in the second – the hot corridor. Each option has its own characteristics, advantages, and disadvantages. Cold Corridor Isolation Principle of Operation: a perforated […] is used to supply cold air flow into the corridor.

Release of SMTP server Sendmail 8.16.1

Five years after the last release, the SMTP server Sendmail 8.16.1 has been released. The new version includes a significant number of improvements related to STARTTLS support (for instance, the ability to use elliptic curve-based encryption algorithms has been added), logging has been enhanced, new options SSLEngine and SSLEnginePath for using OpenSSL engines have been introduced, and initial support for DANE (DNS-based Authentication of Named […] has been added.

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