From a terminal or ALT-F2: sudo apt-get install gedit.
Select gedit in Synaptic ( System → Adminstration → Synaptic Package Manager) gedit can be installed in Kubuntu, Xubuntu and other distributions although additional libraries are necessary and will be installed on non-GNOME systems. Gedit is located in Ubuntu's Main repository and is installed by default. Gedit is suited for both basic and more advanced text editing and is released under the GNU General Public License. These include multilanguage spell checking, extensive support of syntax highlighting, and a large number of official and third party plugins. It is UTF-8 compatible and supports most standard text editor features as well as many advanced features.