Do I need 'apt' directories, or can I delete them?

[Gyulai Mihaly <gyulai@linuxfan.com>]

I just upgraded from 'slink' to 'potato'. Now my /root partition is
full. Do I need the contents of the following directories, or may I
delete them?

 /var/cache/apt  6 MB
 /var/state/apt/lists  3.7 MB
 /var/lib/dpkg/info  4.6 MB
 /var/lib/dpkg/methods/multicd  1 MB

Thanks for suggestions.

-- 
GYULAI Mihály   http://gyulai.freeyellow.com  Rejtő Jenő művei, Linux