I have been using Ubuntu for over 3 years. I want to custom-build-ubuntu-distribution. I am trying to do the needful using Ubuntu 13.04. I have tried the following:- Remastersys - failed. Relinux - failed. Ubuntu Customization Kit - failed. LiveCDCustomizationFromScratch (help.ubuntu.com) - failed. Kindly guide me how to do this, based on the above failed attempts. I think a manual of how to do it would be very very helpful. Thanks and Best Wishes, B. Wajid