fdisk

オプション

-l

List the partition tables for the specified devices

$ sudo fdisk -l /dev/sda
Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Disk model: ST500LT012-1DG14
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: C74DFC48-1E39-4CF0-B86E-F08322A04724

Device         Start       End   Sectors   Size Type
/dev/sda1       2048   1050623   1048576   512M EFI System
/dev/sda2    1050624 960178175 959127552 457.4G Linux filesystem
/dev/sda3  960178176 976771071  16592896   7.9G Linux swap

メモ

fdisk は GPT に対応していない。