how do you reformat

[abredin]

I need to reformat Ubuntu, but I don't know how.
My computer is just Ubuntu noting else, just Ubuntu.

[tamoneya]

put in the liveCD and hit alt-F2 and run:

gksudo gparted

Then just reformat as you wish. Make sure to backup any important data since it will be gone after you reformat.

[abredin]

it didnt work

[p_quarles]

Or you can just reinstall it. Reinstallation formats all the disks you tell it to use.

[kahlil88]

I don't think you need to use gksudo if when running the LiveCD. Look for the Partition Editor in System->Administration

[jasex]

What are you trying to reformat, and for what purpose? Secondary harddrive? A live environment should be able to do that... but to reinstall Ubuntu... just install it again =/