WordPress

All Your Content has Vanished / Error 404 on All Pages

These instructions are for WordPress 3.X that is being hosted on a web server that provides access via cPanel version 11.34.1. The instructions may be the same or similar for other version combinations or interfaces other than cPanel, but no guarantees are made. Possible Symptoms You may encounter one or more of the following symptoms: […]

Ubuntu 12.04

How to Run a Shell / Command Line / Terminal with root Privilege / Access

This tutorial is for Ubuntu 12.04. It should be the same for other versions of Ubuntu and (probably) most other Linux distributions, but no guarantee is made./p> Detailed instructions for opening a command line / terminal can be found here. When you open a terminal in Ubuntu, you do not have administrative privileges. This means […]

Ubuntu 12.04

How to Change the Timeout Period for sudo

This tutorial is for Ubuntu 12.04. It should be the same for other versions of Ubuntu and (probably) most other Linux distributions, but no guarantee is made. Detailed instructions for opening a command line / terminal can be found here. By default, sudo temporarily grants administrative privileges for 15 minutes. This means the first time […]

Mathematics

Understanding the Law of Sines

While trigonometry is used to solve problems involving right angle triangles, it can also be applied to triangles that are not right angle triangles. Assumes you understand basic trigonometric concepts. A tutorial on understanding sine, cosine and tangent can be found here. A tutorial on understanding the trigonometric functions and the unit circle can be […]

Ubuntu 12.04

Command Line Basics: Editing Files

This tutorial is for Ubuntu 12.04. It should be the same for other versions of Ubuntu and (probably) most other Linux distributions, but no guarantee is made. Detailed instructions for opening a command line / terminal can be found here. When you work at the command line, from time to time, it may be necessary […]

Mathematics

Understanding Basic Trigonometric Identities

This tutorial assumes you are familiar with the trigonometric functions and their derivation from the unit circle. A tutorial on the trigonometric functions can be found here. A tutorial on the trigonometric functions and the unit circle can be found here. What is an Identity? An identity (in mathematics) is something that is true (more […]

Ubuntu 12.04

Basic Command Line Techniques

This tutorial is for Ubuntu 12.04. It should be the same for every other version of Ubuntu and all other Linux distros, but I make no guarantee. Linux (on which Ubuntu is based) is fundamentally a command line driven operating system. While there are graphical interfaces to many of the available commands, sometimes you need […]

Mathematics

How to Solve Trigonometric Problems

This tutorial offers advice on how to solve trigonometric problems and provides several problems worked through in detail. It assumes you are familiar with the trigonometric functions sine, cosine, tangent, secant, cosecant, and cotangent. A basic tutorial can be found here. A more advanced tutorial can be found here. If an explanation / walkthrough is […]

Ubuntu 12.10

How to Completely Uninstall/Remove a Package/Software/Program

This tutorial shows how to completely remove or uninstall a package in Ubuntu 12.10. These instructions should work for other versions of Ubuntu, it’s derivatives (Edubuntu, Kubuntu, Lubuntu, Xubuntu, Ubuntu Studio, Myhtbuntu) and other Debian based Linux distributions – but no guarantee is made. This tutorial is definitely on the advanced rather than basic side […]

Blog

Review of the Lazer 7" (MID7109) Tablet

Alcampo (the Spanish arm of the French Auchan chain) had Lazer 7″ tablets on sale for €79 (they also had a 10″ version for €149). Given that the price was unbelievable, I bought one. Reasons for Buying There were two reasons I bought it: 1) The whole idea of a tablet is cool. I watch […]

Ubuntu 12.04

How to Completely Remove / Uninstall Xubuntu Core Desktop

These instructions are for Ubuntu 12.04 running the Unity desktop on which the Lubuntu Core Desktop was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When the Xubuntu Core Desktop is installed in […]

Ubuntu 12.04

How to Completely Remove / Uninstall Lubuntu Core Desktop

These instructions are for Ubuntu 12.04 running the Unity desktop on which the Lubuntu Core Desktop was installed using either the Ubuntu Software Center or sudo apt-get on the command line. The instructions may be the same for other versions of Ubuntu, but no guarantee is made. When the Lubuntu Core Desktop is installed in […]