Ubuntu Ubuntu 18.04 Personal Package Archives (PPA)

Quick command to list software sources and additional PPAs in Ubuntu 18.04

PHP PHP 7.1 type safety

A quick look at how to declare a nullable return type in PHP 7.1 and above.

static sites JAMstack web forms

A few options for handling form submissions on static websites.

Python

Save the contents of a python interactive session to a file.

CSS box-shadow

Quick reference for CSS box-shadow property

KDE Okular PDF Kubuntu

Find and fix the XML file that Okular uses to store PDF bookmark data.

VPN Algo VPN WireGuard Kubuntu Ubuntu Kubuntu 18.04 Ubuntu 18.04 wg-quick networking routing

How setup a WireGuard VPN client on Ubuntu/Kubuntu 18.04 (VPN provisioned using Algo VPN)

rsync linux

Better file/directory copying with rsync; a fast, versatile, remote (and local) file-copying tool

linux Battery Life Power Management Laptops TLP

Some tips to improve laptop battery life on Kubuntu 18.04 (mostly applicable to Ubuntu and other linux variants as well).

Ubuntu 16.04 PHP PHP 7.0 PHP 7.1

How to upgrade from PHP 7.0 to PHP 7.1 on Ubuntu 16.04 LTS (Xenial)

yum CentOS package management linux system administration

A quick reference for Yum - the CentOS package manager.

KDE Wallet KDE SSH Keys ssh-agent ksshaskpass Kubuntu

How to setup KDE Wallet for use with SSH keys with ssh-agent and ksshaskpass.

PHP Composer

How to create a new PHP project from scratch using composer.

PHP PHP functions quick tips web development

A better way to perform intermediate to complex string replace routines in PHP.

CSS SVG web design quick tips

A quick way to change the background color of an SVG image defined in CSS using the mask property.