Convert OPML to PDF with a Bash Script

Many popular programs use a strange file format for data exports called OPML, or “Outline Processor Markup Language” (such as the popular note-taking app, WorkFlowy). This XML-based format is often used to relay outlines and mind maps as a hierarchical, ordered list of arbitrary elements. One of the benefits of using this format is its wide-spread use in other applications as a means of “importing” data. But what if you want to render OPML on your own without using third party software? It was this simple question that led me to write opml2pdf.sh, a simple but powerful Bash shell script. Continue reading Convert OPML to PDF with a Bash Script

On Proof of Stake Design Philosophy

“Cryptography is truly special in the 21st century because cryptography is one of the very few fields where adversarial conflict continues to heavily favor the defender. Castles are far easier to destroy than build, islands are defendable but can still be attacked, but an average person’s ECC keys are secure enough to resist even state-level actors. Cypherpunk philosophy is fundamentally about leveraging this precious asymmetry to create a world that better preserves the autonomy of the individual…”
Vitalik ButerinInventor of Ethereum

Fix the Ubuntu 18.04 Installation Bug (10 Simple Steps)

Several Ubuntu users have been complaining about a particularly annoying bug that has occasionally manifested in the installation process of the new Ubuntu version 18.04 resulting in a “login loop” and an inaccessible system. Here’s how to fix the bug. Continue reading Fix the Ubuntu 18.04 Installation Bug (10 Simple Steps)

The Execution Time Differences Between sed, grep, tr, and Bash

I’ve been writing a lot of time-sensitive server side code recently and in doing so I’ve come up against the timeless issue of execution times. While there exist many useful and easy-to-understand code frameworks and programs out there, some of the more complex and confusing programs simply run faster than them (most likely due to the lack of “fluff” coding involved in their operation). Continue reading The Execution Time Differences Between sed, grep, tr, and Bash

Using Linux: Understanding the Linux Directory Structure

If you’re coming from Windows, the Linux file system structure can seem particularly alien. The C:\ drive and drive letters are gone, replaced by a forward slash “/” and some various cryptic-sounding directories, most of which have three letter names. The whole system can be a bit confusing and frustrating, so I’ve composed this article which will hopefully clear up some of the obscurity behind the Linux directory structure and shed new light on how it works and what it all means. Continue reading Using Linux: Understanding the Linux Directory Structure

Using Linux: Viewing All Active Processes & Programs

Sometimes you need to find out what’s going on behind the scenes on your computer system to answer various questions such as, “why is my system running slowly” – “is malicious software installed on my system” – “what can I cut out to maximize performance” etc. Here’s how to do it… Continue reading Using Linux: Viewing All Active Processes & Programs

Using Linux: Solving the Frozen GUI Login Screen

PROLOGUE

2017-07-24

This post is a re-post of a bug report that I posted on the Ask Ubuntu forum. You can view the original article/topic at the following URL:

https://askubuntu.com/questions/939113/any-inputs-in-the-ubuntu-login-gui-result-in-total-freezing-of-the-system Continue reading Using Linux: Solving the Frozen GUI Login Screen