fdisk, gparted option이 아주 좋은듯. GUI app인 gparted는 따로 설치해야함. 비슷한 GNOME Disks Utility가 Ubuntu에 딸려요
https://www.tecmint.com/linux-partition-managers/
Top 6 Partition Managers (CLI + GUI) for Linux
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df
ls /dev/sd* /dev/nvme*
sudo fdisk -l
sudo fdisk /dev/sda
