Overclocking my old “Raspberry Pi 3 Model B”

The Raspberry Pi 4 boards now cost around $200, sometimes more! Some of us may opt to dust off our old Raspberry Pi 3’s instead of purchasing a new version 4. You may remember my original overclocking posts for Raspberry Pi and the Raspberry Pi 2. This Raspberry Pi 3 overclock post seeks to overclock […]

PHP-FPM tuning: Using ‘pm static’ for max performance

Let’s take a very quick look at how best to set up PHP-FPM for high throughput, low latency, and more stable CPU and memory use. By default, most setups have PHP-FPM’s PM (process manager) string set to dynamic and there’s also the common advice to use ondemand if you suffer from available memory issues. However, let’s […]

Congrats Charles! – Winner of this month’s Firewalla Blue Plus Device

Not long ago, I announced a giveaway contest for three (3) Firewalla Blue Plus Devices! The Firewalla Blue Plus is a network layer security device. It’s an all-in-one, simple, yet powerful firewall that connects to your home router. Today, it’s my pleasure to announce this month’s winner of the second of three Firewalla Blue Plus devices! […]

Raspberry Pi Performance: Add ZRAM and these Kernel Parameters

Previously, I published a Pinebook Pro review article on this blog. Similar to the Pinebook Pro, the Raspberry Pi and, more recently, the Raspberry Pi 4 are also ARM-based. With good results, I’ve applied some of the optimizations mentioned in that previous article to the Raspberry Pi 4. I wanted to share these tweaks and […]

How to forecast metrics with Checkmk

In case you are responsible for any kind of server, you probably are aware of bad surprises that sometimes crash your plans after work or for the weekend. Suddenly, a server goes down, and you have to react to an incident because other people and systems depend on it. In this tutorial, I want to […]

Why we built paperd.ink even after crowdfunding failed

Paperd.ink started as a hobby project from our rooms when we had just graduated our college. Both Rohit & I studied Electronics & Telecommunications engineering for our Bachelor’s. Rohit is the technical brain and creator of the product, whereas I am responsible for promotion, operations, user research, etc. This blog will briefly cover our journey […]

Disable cron emails (solution)

Cron is a daemon that executes scheduled commands. More specifically, the software utility cron is a time-based job scheduler for Unix-like operating systems like Linux. You can use Cron to set up jobs to run periodically at fixed times, dates, or intervals. Cron is an extremely powerful tool because just about anything you can type from […]

Are you measuring Linux web server memory usage correctly?

This article was first published in 2014. Afterwhich, there was a welcomed change to the Linux kernel in 2016; as mentioned in the 2017 article: Does your Linux server need a RAM upgrade? Let’s check with free, top, vmstat and sar. As outlined here, memory is now marked as available by the Linux kernel: “Estimation of […]