Code:
Usage: fdisk [-b SSZ] [-u] DISK     Change partition table
       fdisk -l [-b SSZ] [-u] DISK  List partition table(s)
       fdisk -s PARTITION           Give partition size(s) in blocks
       fdisk -v                     Give fdisk version
Here DISK is something like /dev/hdb or /dev/sda
and PARTITION is something like /dev/hda7
-u: give Start and End in sector (instead of cylinder) units
-b 2048: (for certain MO disks) use 2048-byte sectors
This is the output of sudo fdisk -l, cat /etc/mta