🟢 Low ⏱ 5–15 min Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5245-1 Related CVEs: CVE-2021-26291 Upstream summary: It was discovered that Apache Maven followed repositories that are defined in a dependency's Project Object Model (pom) even if the repositories weren't encrypted […]
Learn how to use grep with regular expressions to search, filter, and process text in Linux and Unix systems. This guide covers syntax, and practical use cases.
Introduction This tutorial covers How to Configure Apache as a Reverse Proxy on SLES 15 on SLES 15. SLES 15 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 15 system is up to […]
URL: https://www.progressiverobot.com/log4j2-example-tutorial-configuration-levels-appenders/ Welcome to the Apache Log4j2 Example Tutorial. If you ask an expert developer about the most annoying thing about an application, the answer might be related to logging. If there is no suitable logging in an application, maintenance will be a nightmare. Most of the application go through Development testing, unit testing, integration testing. But […]
URL: https://www.progressiverobot.com/java-12-features/ Finally, JDK 12 which is a part of the six-month release cycle, is here. It comes after the last Java LTS version 11. We had discussed at length on [Java 11 features](/community/tutorials/java-11-features) before. Today we'll be discussing Java 12 features and see what it has in store for developers. Java 12 was launched […]
Learn how to use variables in Python 3: declaration, naming rules, data types, the type() function, scope, constants, and common mistakes.
🟢 Low ⏱ 5–15 min Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5026-1 Related CVEs: CVE-2018-18020 CVE-2021-36978 Upstream summary: It was discovered that QPDF incorrectly handled certain malformed PDF files. A remote attacker could use this issue to cause QPDF to consume […]
Although it is possible to guard your server environment against attacks, it is important to be able to detect whether an intruder does manage to compromise your security. Tripwire is a tool that can be used to detect changes in the filesystem that may indicate that an unauthorized person has entered and modified files. In this guide, we will discuss how to install and configure tripwire on an Ubuntu 12.04 VPS.
As a micro web framework built on Python, Flask provides an extensible way for developers to grow their applications through extensions that can be integrated into projects. To continue the scalability of a developer’s tech stack, MongoDB is a NoSQL database is designed to scale and work with frequent changes. Developers can use Docker to simplify the process of packaging and developing their applications.
Introduction How to Set Up Uptime Kuma on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration […]
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