PHP 8 Compatibility Check and Performance Tips.

PHP 7 was first released back on 03 Dec 2015. Yes, I’m sure, it’s been around a while! The PHP team encouraged upgrading to PHP 7, hailing its improvements such as being twice as fast, consistent 64-bit support, removal of old and unsupported SAPIs and extensions, improved fatal error resistance, to name a few. A […]

Serving your blog from full-page-cache CDN locations

Ask yourself, if this page didn’t load almost immediately, but instead, there was a blank white page for a few seconds, would you stick around? Around half of web users leave if it takes longer than 3 seconds to load a web page. Two years ago, I used Cloudflare’s Page Rules, specifically the “Cache Everything” […]

PHP Performance: Additional CPU cores vs Faster CPU cores

Some time ago, I received an email from a client experiencing slow performance issues with a LEMP (Linux, Nginx, MySQL, and PHP webserver). During a full audit, I found that the server’s load average was pretty low (see above screenshot). However, the website was indeed very slow. There were some misconfigurations, but one of the […]

pstree command in Linux with examples

This pstree command guide is a follow-up of my previous 90 Linux Commands frequently used by Linux Sysadmins article. Every week, or as time allows, I will publish articles on the ~ 90 commands geared toward Linux sysadmins and Linux power users. Let’s continue this series with the pstree command.   pstree command and examples […]

What CentOS alternative distro should you choose?

In January 2014, CentOS announced it was officially joining with Red Hat while staying independent from Red Hat Enterprise Linux (RHEL) under a new CentOS governing board. However, in December 2020, Red Hat requisitioned that CentOS terminate the development of CentOS 8. They also announced that support would be shifting to a CentOS alternative rolling-release […]

Linux benchmark scripts and tools

This list of Linux benchmark scripts and tools should prove useful for quick performance check of CPU, storage, memory, and network on Linux servers and VPS. Recently, I used a Linux benchmark script, which was no longer maintained. As a result, I compiled this quick list of scripts and tools for Linux benchmarking. Check each […]

Linux: ncdu and mc to manage large directories

Creating, modifying, and deleting files are everyday tasks performed in any operating system, even more so by Sysadmins, Developers, and Programmers. For the most part, these tasks are fast enough when managing a handful of files. However, on Linux and especially with servers, you may at some time have to manage millions or even billions […]

Home Lab Beginners guide – Hardware

Until recently, and for well over the past decade, my wife and I have been nomads. Moving from the Caribbean to Miami, New York, Las Vegas, Vancouver, and now back home. This has meant that for many of those years, my home office basically comprised of a few laptops and screens. These days, we are more […]

ip command from iproute2 – utilities for TCP/IP networking in Linux

This ip command guide is a follow-up of my previous 90 Linux Commands frequently used by Linux Sysadmins article. Every week, or as time allows, I will publish articles on the ~ 90 commands geared toward Linux sysadmins and Linux power users. Let’s continue this series with the IP command. For Linux sysadmins, it is crucial […]

NGINX Reverse Proxy Metrics to Monitor

NGINX is one of the most popular web servers nowadays, especially for Linux web servers. According to nginx.com, it powers more than 400 million websites. It is, however, probably even more commonly used as a reverse proxy. Since it acts as a go-between for your application and your users, it’s important to properly monitor NGINX […]