Ubuntu is a full-featured Linux operating system which is based on Debian distribution and freely available with both community and professional support, it comes with Unity as its default desktop environment. There are other flavors of Ubuntu available with other desktops as default like Ubuntu Gnome, Lubuntu, Xubuntu, and so on. A tightly-integrated selection of excellent applications is included, and an incredible variety of add-on software is just a few clicks away. A default installation of Ubuntu contains a wide range of software that includes LibreOffice, Firefox, Empathy, Transmission, etc.
More informations on https://www.ubuntu.com/desktop
Username: osboxes Password: osboxes.org
RAM: 1024 MB
You need KVM enable on your machine or in the GNS3 VM.
Documentation for using the appliance is available on https://help.ubuntu.com