Scientific Linux (SL) is a Linux operating system distribution created through the joint efforts of Fermilab and CERN, with support from various laboratories and universities around the world. It is built from the source code of Red Hat Enterprise Linux versions in accordance with the end-user license agreement. Recently, more and more users have been transitioning from using […]
The Fermilab laboratory, which is responsible for developing the Scientific Linux distribution, has announced that it will cease the development of a new branch of the distribution. In the future, computer systems at Fermilab and other laboratories involved in the project will transition to the use of CentOS 8. A new branch of Scientific Linux 8, based on the package base of Red Hat Enterprise Linux 8, will not be formed. Instead of maintaining its own distribution, the developers from Fermilab […]
Documentation! When you decide to write your own hook-catching bicycle from Docker Hub or from the registry for automatic container updates or startup on the server, you might find the Docker CLI useful, which will help manage the Docker daemon in your system. You will need Go version 1.9.4 or higher. If you haven't switched to modules yet, install the CLI with the following command: […]
If you use a time series database (timeseries db, wiki) as the main storage for a site with statistics, you might end up with a lot of headaches instead of a solution. I am working on a project that uses such a database, and sometimes InfluxDB, which I will discuss, brought unexpected surprises. Disclaimer: the issues mentioned apply to version InfluxDB 1.7.4. Why time series? The project […]
Introduction to Operating Systems Hello, Habr! I would like to present to your attention a series of translated articles on literature that I find interesting — OSTEP. This material explores in depth the workings of Unix-like operating systems, specifically focusing on processes, various schedulers, memory, and other similar components that make up a modern OS. You can view the original materials here. […]
Hello again! Classes in the new group of the "Linux Administrator" course begin tomorrow, so we are publishing a useful article on the topic. In the previous tutorial, we covered how to use pam_cracklib to strengthen passwords in Red Hat 6 or CentOS systems. In Red Hat 7, pam_pwquality replaced cracklib as the default pam module for validation […]
About a year ago, on April 3, 2018, the Federal Service for Technical and Export Control of Russia published Order No. 55. It approved the Regulations on the information protection means certification system. This defined who is a participant in the certification system. It also clarified the organization and procedure for certifying products designed to protect confidential information that constitutes state secrets, with the means of protection also needing to be certified through the specified system. […]
On June 17 (Monday), the second annual Tarantool Conference, or simply T+ Conf, will take place at the Mail.ru Group office. It is aimed at both beginners and experienced developers and architects in the corporate sector. Expect new talks and workshops on using in-memory computing, Tarantool / Redis / Memcached, cooperative multitasking, and the Lua language for building high-load fault-tolerant […]
LanguageTool is a free open-source system for checking grammar, style, punctuation, and spelling. The core functionality of LanguageTool can be used as an extension for LibreOffice/Apache OpenOffice and as a Java application. An online text checking form is available on the system's website http://www.languagetool.org/ru. A separate LanguageTool proofreader app is available for Android mobile devices. In the new version 4.5: Updated checking modules for Russian […]
The ZeroNet version rewritten in Python3 is ready for testing. ZeroNet is free and open-source software, a peer-to-peer network that does not require servers. It uses BitTorrent technology to exchange web pages and Bitcoin cryptography to sign transmitted data. It is considered a censorship-resistant method of delivering information without a single point of failure. The network is not anonymous due to the nature of the BitTorrent protocol. ZeroNet supports […]
"Secure Shell" (SSH) is a network protocol for establishing a secure connection between hosts, typically over port 22 (which is better changed). SSH clients and SSH servers are available for most operating systems. Inside SSH, nearly any other network protocol can operate, meaning you can work remotely on another computer, transmit audio or video streams over an encrypted channel, etc. Additionally, through […]
Practical examples of SSH that will elevate your remote system administrator skills. Commands and tips will help not only to use SSH but also to navigate the network more effectively. Knowing a few SSH tricks is beneficial for any system administrator, network engineer, or security specialist. Practical SSH examples SSH socks proxy SSH tunneling (port forwarding) SSH tunnel to a third host […]