install mobile terminal from ininjas repo and openssh (search on cydia)
open terminal and type: su
then hit enter
type root password: default "alpine" no quotes
enter
then type: ssh root@(their.IP)
it will promt u for their password, it will be alpine if they havent changed it
if it works then it shud say something like
derps-ipod:~ root#
that means you succesfully did it
there are various things to do from there but idk how to do most thing for messing with their ipod but just google different mobile terminal cmds or there are some topics on this forum that have terminal cmds
to find ip get inet from appstore and scan the network if your on a more private network then it will be a quik scan and it will display the connected devices and their ips (this is the ip you put in to the part after root@, eg ssh
root@192.168.1.101they must be on same network and device must be on (not asleep or off) with ssh installed and on