How to Create our own linux OS on top of ubunbtu
 

I need a workaround to create our own OS on top of ubuntu.

thanks for letting us know.

...

ok, seriously, what do you expect anyone to answer to that?
i will assume there's some kind of help you want from the forums, but you don't specify anything.
please read the question guidelines (first link in my signature).

in any case, i cannot help but wonder why one of the hundreds of already existing ubuntu derivates is not good enough.

how to fork a distro and call it your own?

Welcome to the forums!

I found this article for you. It hasn't been updated for 18.04 yet, but should at least get you started in the right direction. :)

https://help.ubuntu.com/community/In...DCustomization