Kubuntu Desktop
There are several distributed versions of Ubuntu. These include Edubuntu and Kubuntu, both of which are Ubuntu but with a different default environment. Kubuntu is Ubuntu with, however, another very popular desktop environment for Linux called KDE.
This guide is how to totally install Kubuntu desktop and fully uninstall Ubuntu desktop meta-package. Remember, your Ubuntu system will not continue to be an Ubuntu system and offer the GNOME desktop. Your Ubuntu system will be a Kubuntu system and offer KDE desktop instead. But I will give you alternative choice to keep your Ubuntu system continue to be an Ubuntu system and offer the GNOME desktop and you will also have access to the KDE desktop and all the applications that come with a Kubuntu system. Feel free to make your own choice.
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Ubuntu Desktop

Kubuntu Desktop

Installing the Kubuntu Desktop
Open a terminal shell window, you can type the following:

sudo apt-get install kubuntu-desktop

The download can take some time. After the download is complete, the packages are prepared and the installation proceeds. If you are lucky enough to have a good, high-speed Internet connection, the …

Gmail Notifier
Gmail Notifier is a nice little tool to allow you to receive gmail notifications. This tutorial is how to install CheckGmail as Gmail Notifier into your Ubuntu Edgy Eft.
CheckGmail
CheckGmail is a system tray application that checks a Gmail account for new mail. When new mail is present the tray icon changes, an optional animated popup is displayed and a tooltip displays the number and details of new messages. Each message can be opened directly in a browser window, and many common Gmail operations (marking as read, archiving, deleting or reporting as spam) can be carried out on messages directly within CheckGmail, without the need to use the Gmail web interface.
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Installing CheckGmail for Ubuntu Edgy Eft
Good news! CheckGmail is now part of the Ubuntu Universe packages. Therefore make sure you add Universe repositories into your sources.list file
An simple command to install CheckGmail:

sudo apt-get install checkgmail

Well done! Have a great day and gud lak