linux initrd for boot

[Nithin]

in debian i never had an initrd when i built a new kernel.
but in ubuntu if i don't have one, i get unable to mount root fs.

is it because something is not builtin in the kernel?

thanks,
N.

 

[thesix]

First hit of Google.
and
wikipedia.

 

[Nithin]

thx. now i feel stupid for not looking.
but my guess was correct it seems.