How to choose default applications after the installation in Ubuntu Linux
You can select predefined software collections (such as Apache server, mail server, openSSH …etc) during installation of Ubuntu. If you want to select the apps AFTER the installation, you can use the following commands.

milly 3:02 pm on November 24, 2009
There are two ways:
1. In the command prompt, run:
taskselto bring up the GUI and make the selection.2. You can also run:
tasksel --list-tasksto display the list of apps that you can install.Run this command to install:
tasksel install [task_name]