NGINX is a versatile, high-performance web server, often used for reverse proxying, load balancing, and other web-related tasks. One of its strengths is the extensibility provided through modules. While there are many built-in modules, you can also compile your own dynamic modules to extend its functionality. In this tutorial, we will guide you through the …
How to Compile a Dynamic NGINX Module: A Step-by-Step Guide Read More »
Introduction Control Groups (cgroups) are a Linux kernel feature that allows you to allocate resources—such as CPU time, memory, and I/O bandwidth—among user-defined groups of processes running on a system. This guide will walk you through setting up and using cgroups on CentOS 7, giving you fine-grained control over resource allocation. Prerequisites Installing the Required …
SSH (Secure Shell) is the go-to protocol for secure remote login and file transfer over a network. Although it’s designed with security in mind, the security level you get depends on a variety of factors, including the cryptographic algorithms used for the key exchange. In this article, we will look at how to set key …
Managing SSH Key Exchange Algorithms: A How-To Guide Read More »
When it comes to web server software, two of the most popular choices are Nginx and Apache. These web servers power a large portion of the internet and are commonly deployed on Ubuntu servers. While the software itself is well-documented, one area that often puzzles newcomers is the configuration file structure—specifically, the use of directories …
The concept of “data units” is foundational to understanding how data storage works. Below are some of the key types of data units, often referred to as “data storage units”: Why Disk Drive Manufacturers Use 1000 Instead of 1024 The discrepancy between using 1000 bytes and 1024 bytes to define units like KB, MB, GB, …
Lightweight Directory Access Protocol (LDAP) is an open, vendor-neutral application protocol for accessing and maintaining distributed directory information services. FreeIPA (Identity, Policy, and Audit) provides an integrated security information management solution built on top of the LDAP server. Both are crucial in managing and accessing information on Linux-based systems, especially in enterprise environments. If you …
Bash (Bourne-Again SHell) is the most popular shell used in the Linux world. For system administrators, understanding and using Bash is not just a choice but a necessity. The powerful shell provides an environment to run commands, script tasks, and manage systems efficiently. While Bash itself is quite influential, there are numerous command-line programs and …
Three Essential Bash Programs for System Administrators Read More »
In the world of infrastructure as code, Ansible is a popular choice due to its simplicity and human-readable language. However, as with any other coding or scripting language, Ansible playbooks can get messy without proper organization and structure. In this article, we’ll share three top tips for writing more organized Ansible playbooks. 1. Use Descriptive …
Making Your Ansible Playbooks More Organized: Top Three Tips Read More »
The PHP OPcache extension is a powerful tool that can significantly improve the performance of your PHP applications by storing precompiled script bytecode in shared memory. However, like any caching system, it’s crucial to monitor the performance and usage of your OPcache to ensure that it’s configured correctly and operating optimally. In this post, we …
Monitoring PHP OPcache with Telegraf, InfluxDB, and Grafana Read More »
InnoDB is a powerful and widely-used database engine for MySQL, the backend that drives many WordPress sites. One of its most critical components is the InnoDB buffer pool, which significantly impacts the performance of your WordPress site. Understanding how to monitor and manage this pool can help you optimize the efficiency of your website and …
Managing InnoDB Buffer Pool Usage for Improved WordPress Performance Read More »