If the host system does not support Unity then the best option is to install and use Unity 2D as outlined in the previous section of this chapter.
== Installing Updates ==
As with most operating systems today, the each particular release of the Ubuntu distribution continues to evolve after it has been released to the public. This generally takes the form of bug fixes and security updates and, occasionally, new features that may be downloaded over the internet and installed on your system.
Best practices dictate that the first step after installing Ubuntu is to make sure any available updates are applied to the system. This can be achieved either through the desktop environment or via the command-line prompt in a Terminal window.
To check for updates using the graphical Update Manager tool, select the ''Applications'' button in the vertical task management panel located on the left hand side of the screen (the icon with the magnifying glass and a + symbol). In the applications panel enter Update Manager into the search box. The Update Manager will appear in the Installed results and will launch when clicked. Once invoked, the tool will provide a list of the available updates together with references to more detailed information on each one under the ''Description of update'' heading:
[[Image:ubuntu_11_update_manager.jpg|The Ubuntu 11.04 Update Manager]]
Clicking the ''Install Updates'' button will begin the update process which consists of resolving package dependencies, downloading and installation of the updates. The duration of the update process will depend on the number and size of updates available combined with the speed of the internet connection to which the Ubuntu system is connected.
The update process may be configured by clicking on the ''Settings…'' button located in the bottom left hand corner of the update manager window. This dialog provides a range of options including the frequency with which the system checks to see if new updates are available and whether updates should be installed automatically without administrator privileges.
The latest updates may also be applied from within a Terminal window (''Applications -> System Tools -> Terminal'') using the ''apt-get'' command:
<pre>
sudo apt-get upgrade
</pre>
Upon execution, the apt-get tool will provide a list of packages that are available for update and prompt to perform the update.
Once the update is complete the installation is essentially finished and Ubuntu is ready for use.
== Installing Updates ==
