sgdisk

"sgdisk - Command-line GUID partition table (GPT) manipulator for Linux and Unix" - man sgdisk

See also

• gdisk is an interactive prompt interface.
• cgdisk is a curses interface to gdisk, similar to fdisk in MS Windows of yore.

Examples

Delete all GPT and MBR entries and create a new GPT

sgdisk -Z /dev/sdz

Create a new partition

• Partition numbers start at 1
• The syntax here is --new <partition_number>[:<start>[:<end>]]
• See the man page for a variety of ways to reference start and end.

sgdisk --new 1:2048:732566636 /dev/sdz

Randomize GUIDs to ensure uniqueness after cloning

sgdisk --randomize-guids /dev/sdz

Print info about partitions on a disk

sgdisk -p /dev/sdz

Destroy GPT partition table

sgdisk -z /dev/sdz

Print last block number of the largest available section of the disk

sgdisk -E /dev/sdz

Print extended info about the first partition on /dev/sda

sgdisk -i 1 /dev/sdz

Backup a GUID partition table

sgdisk -b ~/sdz_partition_backup /dev/sdz

Restore a GUID partition table

sgdisk -l ~/sdz_partition_backup /dev/sdz

Create a new partition

This creates a 4th partition that is 50G using the default starting point (0 is default)

sgdisk /dev/sdz --new=4:0:+50G

Delete the 4th partition

sgdisk /dev/sdz -d 4

Create a new partition number 4 that fills the biggest available section of the disk

sgdisk /dev/sdz -N 4

Grab the name of a partition

## sloppy, doesn't handle spaces or single quotes
sgdisk /dev/sdk -i 1 | grep '^Partition name' | awk '{print $NF}' | sed "s/'//g"