Complete, Concrete, Concise

Practical information without the bloat

Ubuntu 12.10

How to Lock Your Screen / Computer

These instructions are for Ubuntu 12.10 running the Unity interface. They may be the same for other version combinations, but no guarantee is made. Sometimes you have to leave your computer but don’t want to leave your session open for someone else to start using. One option is to log out, the other is to […]

Ubuntu 12.10

How to Display / Show Hidden Files or Folders

These instructions are for Ubuntu 12.10 running the Unity interface and using Nautilus as the default file browser – this is the default Ubuntu 12.10 configuration. It may work for other version combinations, but no guarantee is made. The default settings in the Nautilus file browser prevent you from seeing certain files and folders. These […]

Ubuntu 12.10

How to Disable / Turn Off Amazon Ads in the Dash

This tutorial shows how to disable advertising from Amazon being displayed in the Dash. The instructions are for Ubuntu 12.10, it should be the same or similar for other versions, but no guarantee is made. One of the changes made in Ubuntu 12.10 is to display advertising from Amazon in the Dash Panel when you […]

Ubuntu 12.10

How to get a Command Line, Shell, or Terminal

These instructions are for Ubuntu 12.10 using the Unity interface (although, hints are provided at the bottom of the article for those who have installed a different desktop). Linux (of which Ubuntu is a flavour) and it’s inspiration Unix, have a strong emphasis and tradition of doing everything via typed commands. Often, when searching the […]

Ubuntu 12.10

VirtualBox Guest Additions not Working

This applies to Ubuntu 12.10 running under VirtualBox version 4.1.22 (or earlier), 4.2.0, 4.2.2, and 4.2.4 under Windows 7 with Service Pack 1. The issue and solution is likely the same for all versions of VirtualBox 4.1.22 and 4.2.x, regardless of which OS they are running on. Unfortunately, the problem with VirtualBox 4.2.2, and 4.2.4 […]

Ubuntu 12.10

Should you Upgrade to Ubuntu 12.10?

Canonical released version 12.10 of Ubuntu OS on October 18, 2012. My opinions are based on final release downloaded and installed with updates on October 18, 2012. This article is an update of an earlier one based on experiences with Ubuntu 12.10 Beta 2. Short Recommendation No. Longer Recommendation Wait a few weeks. Detailed Recommendation […]

Mathematics

Understanding Trigonometric Functions using the Unit Circle (Advanced)

While I call this advanced, it does not mean harder or more complicated, it just means more abstract. Understanding the trigonometric functions (sine, cosine, tangent) using right angle triangles is simply a special case of trigonometric functions using the unit circle. I strongly recommend first reading and understanding the article Understanding Sine, Cosine, and Tangent […]

Blog

The UG802 a New Entry in the Ultra Low Cost, Ultraportable Computer War

It seems that hardly a week goes by these past few months without some announcement of a new ultra low cost (usually USB stick sized) computer. This flurry of activity was kicked off by the Raspberry Pi (a $35 bare bones, exposed circuit board, hobbyist computer featuring a 700MHz ARM CPU, 256MB of RAM). I […]

Blog

Raspberry Pi and the MK802 a Side-by-Side Comparison

All information and links presented were considered accurate as of 02-August-2012. All links to external sites were deemed safe and relevant at the time this article was written. If they cease being valid or safe, please let me know. The Raspberry Pi and MK802 are sub US$100 computers. Raspberry Pi This was the first sub […]

VirtualBox

How to Access USB Devices

These instructions are for VirtualBox 4.1.18 running on Windows 7 with Service Pack 1 with Ubuntu 12.04 (running the Unity Interface) as the guest OS. I believe the instructions are the same (or very similar) regardless of which host OS and guest OS combination you are running, but I make no guarantee. Sometimes you want […]

Ubuntu 12.04

How to Completely Uninstall / Remove GNOME Shell

These instructions are for Ubuntu 12.04 running the Unity desktop on which GNOME Shell 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 GNOME Shell is installed in Ubuntu 12.04, it installs […]

Ubuntu 12.04

How to Completely Uninstall / Remove GNOME

These instructions are for Ubuntu 12.04 running the Unity desktop on which GNOME 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 GNOME is installed in Ubuntu 12.04, it installs several packages […]