How to partition a new disk and format filesystem of the new disk

Partitioning a new disk
>sudo -s
>fdisk -l

>fdisk /dev/sdb : partitioning a new disk
>m for help
>n for adding a new partition
>p for primary
>w

>fdisk -l  : checking it's right

Format file_system of the new disk
>mkfs.ext4 /dev/sdb1