Minimum system requirements
To install or try Xubuntu within the Desktop/Live DVD, you need 256 MB of memory, if you are using the Minimal CD, which uses the non-graphical Debian Installer and downloads packages as you install, you need 128 MB of memory.
Once installed, you should have at least 512 MB of memory.
When you install Xubuntu from the Desktop CD, you need 6.1 GB of free space on your hard disk. The Minimal CD requires you to have 2 GB of free space on your hard disk.
Your processor needs to support PAE in order to run Xubuntu.
Recommended system resources
To get a smooth experience when running multiple applications parallel on the desktop, it is recommended to have at least 1 GB of memory.
It is recommended to have at least 20 GB of free space on your hard disk. This allows new application installations as well as saving your personal data on the hard disk in addition to the core system.