Ubuntu 9 10 not updating from cd
Upgrades to 10.04 LTS should be only to 10.10 (no longer supported), or directly to 12.04 LTS. Also, it will prove to be useful, as you rightly suggest, for installation on multiple systems. However, I think you will need to have the ISO file on another medium (such as another hard drive, or a USB/CD/DVD) Booting from Grub2: https://help.ubuntu.com/community/Grub2/ISOBoot Installing over the network: Is it possible to install Ubuntu through network?
Potentially what can happen is that a During the upgrade, any PPA sources you may have added will be automatically disabled. There are a couple of specific PPAs that could cause issues - Your 13.10 upgrade program will alert you of the new release and offer an upgrade.The upgrade may be incomplete or your system may be corrupted if your internet connection is interrupted.Use Lish or Glish to perform this upgrade in a stable environment that does not rely on an active internet connection to your Linode.If you subscribe to the Linode Backup Service, we recommend that you take a manual snapshot before upgrading to Ubuntu 16.04 LTS.If you use another backup service or application, we recommend that you make a manual backup now.
This answer summarizes the recommended community upgrade process.