https://www.ubuntu.com/
Remastersys is a tool which can be used to create a custom live Ubuntu / Debian CD. But it’s not like the other such tools we’ve already covered as it can be used to clone your current installation which you can then use to either share it with your friends or create your own Ubuntu derivate. Don’t worry about your private data and such, that’s not going to be included onto the CD.
But that’s not all there is to Remastersys: you can also use it for a full system backup onto an installable CD, DVD or USB drive – this will also include your personal data and you can later use it like any live CD/USB to reinstall your whole system and data.
To install Remastersys in Ubuntu Karmic and newer, run the following commands:
sudo add-apt-repository “deb https://www.geekconnection.org/remastersys/repository karmic/”
sudo apt-get update
sudo apt-get install remastersys
More info on the topic can found here:
https://www.ubuntugeek.com/create-custom-ubuntu-live-cd-with-remastersys-in-karmic.html
