# fdisk

[fdisk(8)](/https://man.openbsd.org/fdisk) is a disk partitioning utility. It is optionally used when installing OpenBSD to change the default partition layout of the disk.

!!Usage

Consult the man pages for fdisk(8), [disklabel(8)](https://man.openbsd.org/disklabel), and [[fstab(5)](/https://man.openbsd.org/fstab). If you are familiar with Linux, read these twice, because they work a little differently in OpenBSD.Consult the man pages for fdisk(8), [disklabel(8)](https://man.openbsd.org/disklabel), and [[fstab(5)](/https://man.openbsd.org/fstab). If you are familiar with Linux, read these twice, because they work a little differently in OpenBSD.