mkfs.ext4

Create an ext4 filesystem inside a partition. More information: https://manned.org/mkfs.ext4.

• Create an ext4 filesystem inside partition 1 on device b (sdb1):

sudo mkfs.ext4 /dev/sdb1

• Create an ext4 filesystem with a volume-label:

sudo mkfs.ext4 -L volume_label /dev/sdb1