update speed is so slow, and i have download the new iso file:ubuntu-12.04-desktop-i386.iso, can i update directly from the iso file ?
my version is 11.10, Any help is appreciated.
Ubuntu – Can i update from “ubuntu-12.04-desktop-i386.iso” file
12.04upgrade
Best Answer
Upgrading by using the CD or USB image
If you are using 10.04 LTS or 11.10 and you either insert the live CD or boot from the live CD to start installing it will give a option of upgrading to 12.04. It will automatically detect installed applications and install the updated version of your applications also.
If you download an ISO, the recommendation is to perform a md5sum check to ensure both the ISO downloaded and the burned CD are valid.
NOTE: Upgrades from 10.04 to 12.04 are not activated yet, see this question for more detail:
Why is "No new release found" when upgrading from a LTS to the next?
Upgrade from 11.10
![enter image description here](https://i.stack.imgur.com/QB7SV.png)
Taken from 12.04LTS upgrade