How to create a new partition using fdisk unix commands in linux and unix.

MANAGING PARTITIONS

What is partition?
Partitioning is a means to divide a single hard drive into many logical drives. A partition is a contiguous set of block on a drive that are treated as an independent disk. A partition table is an index that relates sections of the hard drive to partitions.
This tutorial shows you how to actually partition your hard drive with the fdisk utility. Linux allows only 4 primary partitions. You can have a much larger number of logical partitions by sub-dividing one of the primary partitions. Only one of the primary partitions can be sub-divided.