How do I format a thumb drive in Kubuntu Hardy KDE 3.5.9

[Steven Vollom]

Jonas Norlander wrote:
> 2008/10/2 Steven Vollom <stevenvollom at sbcglobal.net>:
>   
>> Meti info says that the thumb drive has only 25% of 1gb remaining;
>> Dolphin says the drive is empty.  Apparently it is nearly full, because
>> when I try to put a 700mb file in it, it says it does not have room for
>> it.  TIA for any help.
>> Steven
>>
>>     
>
> You can use the disk free "df -h" console command to see how much
> space you have on your mounted disks.
> And you can use the disk usage "du -sh /somedir" command to see how
> much space recursively that directories take up.
>
> / Jonas
>
>   
I tried su -sh /somedir and got nothing.  I am confused and 
inexperienced in using the Shell.