Upgrade Ubuntu Linux Versions from 9.04 to 9.10

Ubuntu ver 9.10 is going to get released at the end of October 2009. If you are already having ubuntu 9.04 version, then you can upgrade as below,

Steps :
1. Press Alt+F2. This will open "Run Application" window.
2. Type in "update-manager -d" and click on run.
3. You will see a Update manager window, which will ask you to confirm updates.