Ubuntu 9 04 not updating from cd
In this step, we will cover multiple backup methods.
If you are using Digital Ocean, it's advised that you make a snapshot through the control panel in addition to syncing the files to your local computer.
To avoid the nightmare, packaging scripts only in general support upgrading from the version of the package included in the previous Ubuntu release ( from the previous LTS release, in the case of a package included in an LTS release).
Upgrading directly from the penultimate, or earlier, version to the current version (called a "skip upgrade) is possible, but is liable to result in a misconfigured system.
The cdimage server also hosts releases of other Ubuntu images not found on this server, such as builds for less popular architectures and other non-standard and unsupported images.
If upgrades from all previous versions of Ubuntu were supported then this would quickly become a maintenance nightmare, as packaging scripts would have to be able to convert from all previously used formats to the current format.This type of CD is what most people will want to use.