gdisk

List partitions

$ sudo gdisk -l

$ sudo gdisk /dev/sdX

gdisk [options] device

gdisk is an interactive GPT (GUID Partition Table) partitioning tool, similar to fdisk but designed specifically for GPT disks. It can create, delete, and modify partitions on modern UEFI systems.
GPT is the modern partitioning scheme that replaces MBR (Master Boot Record), supporting disks larger than 2TB and more than 4 primary partitions (up to 128). gdisk maintains both primary and backup partition tables for redundancy.
gdisk can also convert MBR disks to GPT (and vice versa with sgdisk), though this should be done carefully with backups.

-l, --list

List partition tables for all devices and exit

Device to partition (e.g., /dev/sda, /dev/nvme0n1)

?

Open help menu

Print partition table

Add new partition

Delete a partition

Change partition type

Change partition name

Write table to disk and exit

Quit without saving changes

Requires root privileges. Changes are only written when using w command. Converting between MBR and GPT can cause boot issues if not done correctly. Always backup important data before partitioning.

gdisk (GPT fdisk) was created by Roderick W. Smith and first released around 2009. It was developed to provide a text-mode GPT partitioning tool similar in interface to the classic fdisk, as UEFI and GPT became the standard for modern systems.

fdisk(8), parted(8), cfdisk(8), sgdisk(8)