Disk and partitions in diagram, size (Mb) and mounting points (directories):
Lists all block devices, UUID and partition:
Block devices, UUID and attributes (issues with unpartitioned):
Cfdisk is an interactive app for disk partitioning. It lets you create, delete, and modify partitions on a block device.
for current disk:
or selected disk:
Parted is partition manager which can output brand, model of your disks, their Size (Gb) , file system etc.
Partitions with usage (%) and available space:
Partitions and types, space (Gb/Mb) and sectors:
Sfdisk gives disk size (Gb & bytes), sectors, partition type
sfdisk -l /dev/your.disk
When used without argument, is a partitioning tool