If you are on Ubuntu 12.04 LTS (which still has support for 5 years) you can upgrade to the new version.
From the Unity Dash, fire up the Software Updater - or from a terminal, it's:
To run the upgrade process, again, in the Terminal:
sudo apt-get update && sudo apt-get dist-upgrade
It should display the following message: “New distribution release ’12.10′ is available”.
Click Upgrade and follow the on-screen instructions.
To update from others versions see https://help.ubuntu.com/community/PreciseUpgrades. RC
What's new in Ubuntu 12.10
- Xorg xserver 1.13
- Secure Boot for the UEFI Security
- Unity 6.8.0 with appearance and performance improvements
- Linux Kernel 3.5.5
- Notable changes in the design of the themes and icons of the distribution
- Inclusion of new lenses such as lens controversial Amazon
- New Menu synchronization
- Accessibility is turned on by default.
- Ubuntu Medium font has been included.
- Ubuntu One Music Web Apps
- An installation image much heavier
- Signed for use GRUB2 UEFI and Secure Boot
- Full disk encryption
- And the updated versions of Open Source applications such as Libre Office, GIMP and Firefox.