$ lsblk
The output is as follows:
There are seven columns namely:
NAME : This is the device name.
MAJ:MIN : This column shows the major and minor device number.
RM : This column shows whether the device is removable or not. Note in this example the device sdb and sr0 have their RM values equals to 1 indicating they are removable.
SIZE : This is column give information on the size of the device. For example 298.1G indicate the device is 298.1GB and 1K indicate the device size is 1KB.
RO : This indicates whether a device is read-only. In this case all devices have a RO=0, indicating they are not read only.
TYPE :This column shows information whether the block device is a disk or a partition(part) within a disk. In this example sda and sdb are disks while sr0 is a read only memory (rom).
MOUNTPOINT : This column indicates mount point on which the device is mounted.
The default option does not list all empty devices. To view these also use the command as follows:
$ lsblk -a
- See more at: http://linoxide.com/linux-command/linux-lsblk-command/#sthash.6Y15eVc8.dpuf