PHP  PHP 7.1  type safety 

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

Ubuntu  Ubuntu 18.04  Personal Package Archives (PPA) 

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

Python 

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

static sites  JAMstack  web forms 

A few options for handling form submissions on static websites.

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)

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).

rsync  linux 

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

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.

linux  KDE  Kubuntu  Kubuntu 18.04 

Notes on setup and preferences for Kubuntu 18.04