Quote:Canonical released a new version of the organization's Ubuntu GNU/Linux distribution; Ubuntu 18.10, called Cosmic Cuttlefish, comes with a new community desktop theme, improved snap desktop integration, multi-cloud computing optimizations and other improvements.

Ubuntu 18.10 will be supported for nine months; organizations and users who require long term support should stay with Ubuntu 18.04 LTS instead which is supported for five years.

Desktop systems running Ubuntu 18.04 can be upgraded in the following way:Select Software & Updates in the System Settings.

1. Switch to the Updates tab.
   
2. Set "For any new version" in the "Notify me of a new Ubuntu version" menu.
   
3. Use Alt-F2 to open a command box and type update-manager -c to open the Update Manager.
   
4. Click Upgrade to start the upgrade process to Ubuntu 18.10
   

ISO images for all *buntu flavors are also available. Check the top of the release notes for direct downloads.

Users should check the list of known issues before they run the upgrade to the new version of Ubuntu.

Full reading: https://www.ghacks.net/2018/10/19/ubuntu-18-10-released-with-new-desktop-theme/