Since ClickHouse is a specialized system, it is important to consider the features of its architecture during its use. In this presentation, Alexey will discuss examples of typical mistakes made when using ClickHouse that can lead to ineffective performance. Practical examples will illustrate how selecting a particular data processing scheme can significantly impact performance. Hello everyone! My name is […]
A group of researchers from Ruhr University Bochum (Germany) has presented the ReVoLTE attack technique (PDF), which enables the interception of encrypted voice calls in 4G/LTE cellular networks that use VoLTE (Voice over LTE) technology for voice traffic transmission. To protect phone calls from interception in VoLTE, stream cipher-based encryption is applied to the channel between the client and the operator. The specification […]
A new release of the CAELinux 2020 distribution is now available, built on the package base of Xubuntu 18.04 and featuring an extensive selection of specialized applications aimed at automating engineering tasks, mathematical modeling, and scientific research. The size of the bootable ISO image, which can operate in Live mode, is 5.8 GB (x86_64). Some of the included applications are: A package for modeling and analyzing thermodynamic processes, Salome-Meca; […]
Given: VPS server with a perpetual ISPmanager Lite 5 license, 10-20 users on the server, Google Calendar with regular reminders about expiring hosting. Tired of paying for anything else, especially on subscription. Goal: to eliminate Google Calendar and manual reminders to clients about renewing hosting. To free myself from 'let them work a little longer' […]
The Document Foundation has published download statistics for the week following the release of LibreOffice 7.0. It is reported that LibreOffice 7.0.0 was downloaded 422,000 times. The press release about the new release was viewed 113,000 times, and the video showcasing new features was watched 48,000 times. Notably, the almost stagnant project Apache OpenOffice has been left behind since the release at the end of September 2019 […]
The release of the web content management system WordPress 5.5 has taken place. The release has been codenamed "Eckstine" in honor of singer Billy Eckstine. This release is notable for introducing auto-update features for plugins and themes. On one hand, this feature will help address the issue of using outdated plugins that become targets for attacks after vulnerabilities are discovered. On the other hand, there is a risk of automated […]
In the beginning, there was a technology called BPF. We looked at it in the previous, Old Testament, article in this series. In 2013, thanks to the efforts of Alexei Starovoitov and Daniel Borkman, an enhanced version was developed and included in the Linux kernel, optimized for modern 64-bit machines. This new technology briefly had the name Internal BPF, […]
After Zextras released its own builds of Zimbra Collaboration Open-Source Edition 9, many administrators decided to upgrade their mail servers to the new version and reached out to Zextras technical support to inquire about how this can be done without jeopardizing the functionality of one of the enterprise's key systems. Upgrading to Zimbra OSE 9 from Zextras can be done […]
The release of the main branch of nginx 1.19.2 has been formed, continuing the development of new features (only changes related to fixing serious bugs and vulnerabilities are made in the parallel stable branch 1.18). Key changes: Keepalive connections are now starting to close before exhausting all available connections, and corresponding warnings are reflected in the log. An optimization for reading the client’s request body has been implemented when using chunked transfer. […]
Intel has reported the elimination of 22 vulnerabilities in its server motherboards, server systems, and compute modules firmware. Three vulnerabilities have been assigned a critical level (CVE-2020-8708 — CVSS 9.6, CVE-2020-8707 — CVSS 8.3, CVE-2020-8706 — CVSS 4.7), manifesting in the firmware of the Emulex Pilot 3 BMC controller used in Intel products. These vulnerabilities allow unauthorized access without authentication […]
The release of the QEMU project 5.1 has been presented. As an emulator, QEMU enables the execution of programs built for one hardware platform on a system with a completely different architecture, for example, running an ARM application on an x86-compatible PC. In virtualization mode, the performance of code execution in an isolated environment is close to that of a native system due to direct execution of instructions on the CPU and utilization of […]
Have you studied Git commands but want to understand how continuous integration (CI) happens in reality? Or perhaps you want to optimize your daily actions? This course will provide you with practical continuous integration skills using a GitHub repository. This course is not designed as a wizard that you can simply click through; on the contrary, you will be performing the same actions […]
Russian Russian
Italian
German
Polish
Estonian
Albanian
Bulgarian
Croatian
Czech
Danish
Dutch
English
French
Hungarian
Latvian
Norwegian
Portuguese
Romanian
Slovak
Slovenian
Spanish
Swedish