file system - How to detect filesystem type of un-mounted partition?

These commands won't work:

fdisk -l      #outputs nothing...
su; fdisk -l  #nothing..
sudo fdisk -l #sudo not found...
parted -l     #parted not found...

Is there any app that shows that easly?

EDIT:

For now I had to attach the sdcard to PC and let Linux mount it, I found the partition was ext3 and not ext2 that I thought! All I read says partition must be mounted to know its type. I think we must create a path and mount it with automatic detection and see mount output to know the partition type.