mkfs.ext4

Creates an ext4 filesystem on a partition.

Ubuntu CentOS Debian Arch SUSE Slackware Alpine Fedora

Verified: 2026-05-12

Syntax

$mkfs.ext4 [OPTIONS] DEVICE

Examples

$mkfs.ext4 /dev/sdb1

$mkfs.ext4 -L data /dev/sdb1

Typical use cases

Standard usage

mkfs.ext4 --help

Note Specialized mkfs variant for ext4.

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