Hi@akhtar,
To create new partition you can follow the below given steps one by one.
- Enter the particular hard disk name.
 
$ fdisk /dev/sdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x3f5179f6.
Command (m for help):
- 
Enter n to create new partion.
 
- 
Enter p to create primary partition.
 
- 
Give size of the partition.
 
- 
Save it with w.
 
Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-20971519, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519): +1G
Partition 1 of type Linux and of size 1 GiB is set
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
$ udevadm settle
Hope this will help.
Thank You