LTS to LTS Upgrade

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http://askubuntu.com – Another question with this URL: How do I upgrade from 10.04 or 11.10 to 12.04? Has this: If you choose to upgrade before then, you can pass the -d option to the upgrade tool, running do-release-upgrade -d or update-manager -d, to upgrade from vanilla 10.04 to 12.04. Am I correct in assuming that if I am actually running 10.04.4 (not vanilla?) that the above command line instructions would NOT work? I really do not mind waiting for the GUI Update Manager to show me the availability at 12.04.1 in July. I am just curious. (HowTos)