If you have installed VirtualBox on Ubuntu 12.04, you can download the latest package from http://www.virtualbox.org. You can then install it in a terminal window using dpkg. It will be upgraded, if already installed. $ sudo apt-get upgrade virtualbox*.deb <enter>
If you have installed Swiftfox, an alternative browser to Firefox, in Ubuntu 12.04, you can remove it using the following command in a terminal: $ sudo apt-get install aptitude <enter> $ sudo aptitude purge swiftfox-prescott <enter> If you try to remove it with apt-get or dpkg, you will not find the package. However, aptitude finds … Continue reading How to remove Swiftfox in Ubuntu 12.04
If you do not want to use the Software Center, you can download and install synaptic to manage packages. Open a terminal window, then enter the command below at the $ prompt. $ sudo apt-get install synaptic <enter>
You can control the Unity desktop more finely, by installing the MyUnity package. MyUnity allows you to change more settings than the default allowed by Ubuntu. You can install MyUnity using the following command: $ sudo apt-get install myunity <enter>
$ sudo apt-get install ubuntu-restricted-extras <enter> Use this to install the restricted codecs, fonts, and more for your Ubuntu, Xubuntu or Lubuntu Linux installation.
Below is example of removal of a repository. See the directory /etc/apt/sources.list.d for more lists. $ sudo rm /etc/apt/sources.list.d/medibuntu.list <enter>