Package Management Essentials: apt, yum, dnf, pkg
Learn how apt, yum, dnf, and pkg manage software on Linux and FreeBSD. Compare commands, workflows, and best practices. Start with the right tool for your system.
How to Install Rust and Cargo on RHEL 7
How to Install Rust and Cargo on RHEL 7 Rust is a systems programming language designed for safety, speed, and concurrency. It has quickly become one of the most loved languages among developers due to its memory safety guarantees, zero-cost abstractions, and powerful type system. Unlike garbage-collected languages, Rust achieves memory safety at compile time […]
JUnit Display Name – @DisplayName
URL: https://www.progressiverobot.com/junit-display-name-displayname/ JUnit @DisplayName annotation is used to provide a custom name for the test class and test methods. We can use spaces, special characters, and even emojis in the display name. JUnit Display Name Example By default, [JUnit](/community/tutorials/junit5-tutorial) reporting prints the class name and method name in the IDE test report. We can use […]
FreeBSD 12 — pjsip — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 3 August 2021 Affected versions: FreeBSD 12 📖 ~4 min read • Source: FreeBSD VuXML VuXML topic: pjsip — Race condition in SSL socket server Related CVEs: CVE-2021-32686 Upstream summary: pjsip reports: There are a couple of issues found in the SSL socket: A race condition between […]
How To Use *args and **kwargs in Python 3
In this tutorial, we will cover the syntax of working with *args and **kwargs as parameters within functions to pass a variable number of arguments to a given function. Both can be used improve readability and convenience, and are best for situations where the number of inputs within the argument list will remain relatively small.
How To Set Up mod_security with Apache on Debian/Ubuntu
Here’s how to set up mod_security with Apache on Debian/Ubuntu.
IBM AIX 7.1 — CVE-2021-38951 — denial of service — patch and remediation guide
🟠 High ⏱ 30–90 min Last verified: 3 August 2021 Affected versions: IBM AIX 7.1 📖 ~4 min read • Source: NVD CVE-2021-38951, IBM Support Bulletin CVE: CVE-2021-38951 NVD summary: IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to a denial of service, caused by sending a specially-crafted request. A remote […]
How To Set Up a Multi-Node Kafka Cluster using KRaft
Learn to create a Kafka cluster with KRaft for scalable, fault-tolerant real-time data processing in this step-by-step tutorial.
AlmaLinux 8 — ansible-pcp — vulnerability — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read • Source: AlmaLinux ALSA ALBA-2022:1843 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]
How to Use OpenSSL to Generate, Sign and Manage SSL Certificates on RHEL 8
SSL/TLS certificates are the foundation of encrypted communications on the internet, authenticating servers and encrypting data in transit. On RHEL 8, OpenSSL provides a full-featured toolkit for creating your own Certificate Authority, generating server certificates, and managing the entire certificate lifecycle. Understanding this process is essential for securing internal services without relying on external providers. […]
