Marble Testing RxJS Observables
Learn how to easily test Observables visually using marble diagrams to define observable streams and running assertions on those streams.
How To Move a MySQL Data Directory to a New Location on Ubuntu 16.04
Whether you’re adding more space for data or evaluating ways to optimize database performance, this tutorial will guide you through relocating MySQL’s data directory.
SLES 12 — xtrans — vulnerability — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: SLES 12 📖 ~4 min read • Source: SUSE advisory SUSE-SU-2023:3189-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-25697 Upstream summary: A privilege escalation flaw was found in the Xorg-x11-server due to a lack of authentication for X11 clients. This flaw allows an […]
How To Monitor System Authentication Logs on Ubuntu
This guide will cover how to monitor login information on a Linux system. You can do this by monitoring plain-text log files and using included utilities like last and lastlog to view binary logs.
How To Monitor MongoDB’s Performance
MongoDB comes installed with a variety of tools and utilities you can use to observe database performance. In this tutorial, you’ll learn how to monitor database metrics on-demand using built-in commands and tools. You’ll also become familiar with MongoDB’s database profiler which can help you detect poorly optimized queries.
How to Configure DirectAccess with IPv6 on Windows Server 2012 R2
How to Configure Windows Server 2012 R2 as a VPN Server with SSTP Secure Socket Tunneling Protocol (SSTP) is a VPN protocol that encapsulates PPP traffic inside HTTPS, using port 443 for all VPN data. This makes SSTP the most firewall-friendly VPN protocol available — it works through virtually any firewall, NAT device, or web […]
![How To Install the Apache Web Server on Ubuntu 20.04 [Quickstart] — step-by-step Linux tutorial on Progressive Robot](https://www.progressiverobot.com/wp-content/uploads/2026/05/how-to-install-the-apache-web-server-on-ubuntu-20-04-quickstart-82799-featured.png "How To Install the Apache Web Server on Ubuntu 20.04 [Quickstart] 7")
How To Install the Apache Web Server on Ubuntu 20.04 [Quickstart]
The Apache HTTP server is the most widely-used web server in the world. It provides many powerful features, including dynamically loadable modules, robust media support, and extensive integration with other popular software. In this guide, we’ll explain how to install an Apache web server on your Ubuntu 20.04 server.
How To Install Linux, Nginx, MySQL, PHP (LEMP) stack On CentOS 7
In this guide, we’ll get a LEMP stack installed on an CentOS 7 server. A LEMP software stack is a group of open source software that is typically installed together to enable a server to host dynamic websites and web apps. This term is actually an acronym which represents the Linux operating system, with the ENginx web server (which replaces the Apache component of a LAMP stack). The site data is stored in a MySQL database (using MariaDB), and dynamic content is processed by PHP.
Debian 9 — vlc — multiple vulnerabilities (8 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Debian 9 (stretch) 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2017-9300 CVE-2017-17670 CVE-2018-11529 CVE-2018-19857 CVE-2019-5439 CVE-2019-13602 CVE-2020-6071 CVE-2020-13428 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix […]
How To Install Docker Compose on Debian 9 (ON-DEBIAN-9)
Docker Compose makes it easier for users to orchestrate the processes of Docker containers, including starting up, shutting down, and setting up intra-container linking and volumes.
