Ubuntu 13.04 released: how to upgrade

Ubuntu 13.04 “Raring Ringtail” has been released today as part of the usual six month release schedule of the Linux distribution.  New users can download the latest version directly from the Ubuntu website where the desktop version can be downloaded as a 32-bit or 64-bit release. Both downloads have  a size of about 700 Megabyte and come in form of a disc ISO image that needs to be burned to disc or written to an USB device. Wubi, the helpful installer for Windows, is not included in the release

Read more: https://www.ghacks.net/2013/04/25/ubuntu-13-04-released-how-to-upgrade/