Ubuntu 12.04

How to Completely Uninstall / Remove Lxde

These instructions are for Ubuntu 12.04 running the Unity desktop on which the lxde window manager 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 Lxde window manager is installed in […]

Ubuntu 12.04

Ubuntu 12.04- How to Completely Uninstall / Remove Lxde Core

These instructions are for Ubuntu 12.04 running the Unity desktop on which the lxde-core window manager 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 Lxde Core window manager is installed […]

Ubuntu 12.04

How to Boot Directly to the Desktop

These instructions are for Ubuntu 12.04 running the Unity interface. They may be the same or similar for different versions of Ubuntu, or using a different (GNOME based) GUI interface, but no guarantee is made. When you install Ubuntu, one of the options you are given is whether to automatically login (go directly to your […]

Ubuntu 12.04

How to Get a Login Screen

These instructions are for Ubuntu 12.04 running the Unity interface. They may be the same or similar for different versions of Ubuntu, or using a different (GNOME based) GUI interface, but no guarantee is made. When you install Ubuntu, one of the options you are given is whether to automatically login (go directly to your […]

Ubuntu 12.04

GNOME Desktop Not Working – Looks like GNOME Classic

This is for the GNOME Desktop installed on Ubuntu 12.04 The problem and solution is likely the same for all other Linux distros, but no guarantee is made. One of the alternative desktops you can install is GNOME (or, more accurately, GNOME 3). Unfortunately, in some cases, instead of getting the new GNOME desktop: you […]

Ubuntu 12.04

Cinnamon Desktop Not Working – Looks like GNOME

This is for Cinnamon Desktop 1.4 installed on Ubuntu 12.04 The problem and solution is likely the same for all other Linux distros, but no guarantee is made. One of the alternative desktops you can install is Cinnamon. Unfortunately, in some cases, instead of getting the Cinnamon desktop: you get the GNOME Classic (no effects) […]

Ubuntu 12.04 Server

How to Install a GUI

Just because you have installed Ubuntu Server doesn't mean you are stuck with the Linux console. This article takes a look at available GUIs and groups them by how much disk space they take up.

Ubuntu 12.04

Lock Screen Does not Work

This tutorial is for Ubuntu 12.04 running the Unity interface. It may be the same for other version combinations but no guarantee is made. Sometimes, after upgrading to Ubuntu 12.04, the Lock Screen functionality stops working. The likely problem is that gnome-screensaver has been uninstalled. Using the Command Line 1) Open a terminal using Ctrl+Alt+L […]

Mathematics

Understanding Sine, Cosine and Tangent

An article explaining trigonometric functions using the unit circle can be found here Using the unit circle is the standard way trigonometric functions are defined and understood in mathematics. I recommend reading and understanding this article first. Later, if you want to understand how trigonometric functions are defined for values greater than 90° or less […]

Ubuntu 12.04

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

This tutorial shows how to completely remove or uninstall a package in Ubuntu 12.04. These instructions should work for other versions of Ubuntu, it’s derivatives (Edubuntu, Kubuntu, Lubuntu, Xubuntu, Ubuntu Studio) and other Debian based Linux distributions – but no guarantee is made. This tutorial is definitely on the advanced rather than basic side of […]

Blog

Fedora 16 – First Impressions – Not Positive

UPDATED 11-May-2012 I have discovered that the problem with Software Updates and Add/Remove Software noted below was caused by VirtualBox Guest Additions not being correctly installed. This happened because the Linux kernel header files are not installed, GCC (a compiler) is not installed, make (a tool for GCC) is not installed. Installing gcc and make […]

Ubuntu 12.04

Virtualbox Guest Additions Stop Working after Update

These instructions are for Ubuntu 12.04, with the Unity interface, running under VirtualBox 4.1.12_77218. They should be the same or similar for other version combinations, but no guarantee is made. Sometimes, when Ubuntu updates are applied to your system, the VirtualBox Guest Additions stop working. Symptoms may include: (1) screen resolution reverts back to the […]