There is a problem I would like to ask about

[kuuga]

I useful Ubuntu, Sabayon more interest, if I want Ubuntu and Sabayon common and become a dual system installed on a computer does not know what it?
At the same time, I want to ask, each with Ubuntu I must in a terminal run the following command:
sudo apt-get update && sudo apt-get upgrade
But if in Sabayon, I should how to enforce it?

[manifesto]

Kuuga
You can dual boot sabayon and ubuntu by installing sabayon on different disk partition.
You need to create partitions to do that, you can use gparted in ubuntu or from liveCD and then you install on this empty partition.
You need to understand partionning and boot loaded or you may break everything.

Then boot loaded should find all you os and configure dual boot.
Package manager is equo and you can do equo update/upgrade.
See wiki

La thing you should separate user's data from OS to make sure you dont loose everything with some bad manipulatoin on partition.
At least use one partition for home FS.

If you can rebuild from scratch you can try until you have this partitions build up.

[dave_64]

My method would be the following:
su -
(enter and give root password)
From the root prompt:
equo update
Wait for it to finish, then:
equo upgrade --fetch
Wait for it to finish, then:
equo upgrade
You may have to agree to license agreements, and, check for these words at the end of the procedure:
"Please run equo conf update"
So do that if needed.

That's just my method.