dexter@dexter-VirtualBox:/etc/lvm$ sudo lvdisplay -C
  LV     VG        Attr      LSize  Pool Origin Data%  Move Log Copy%  Convert
  root   ubuntu-vg -wi-ao--- 31,24g
  swap_1 ubuntu-vg -wi-ao---  8,61g

dexter@dexter-VirtualBox:/etc/lvm$ sudo vgdisplay -C
  VG        #PV #LV #SN Attr   VSize  VFree
  ubuntu-vg   1   2   0 wz--n- 39,89g 32,00m

dexter@dexter-VirtualBox:/etc/lvm$ sudo pvdisplay -C
  PV         VG        Fmt  Attr PSize  PFree
  /dev/sda5  ubuntu-vg lvm2 a--  39,89g 32,00m

dexter@dexter-VirtualBox:/etc/lvm$ sudo fdisk -l

Disk /dev/sda: 85.1 GB, 85060485120 bytes
255 heads, 63 sectors/track, 10341 cylinders, total 166133760 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000f1bf2

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      499711      248832   83  Linux
/dev/sda2          501758    84158463    41828353    5  Extended
/dev/sda3               1        2047        1023+  83  Linux
/dev/sda5          501760    84158463    41828352   8e  Linux LVM

Partition table entries are not in disk order

Disk /dev/mapper/ubuntu--vg-root: 33.5 GB, 33546043392 bytes
255 heads, 63 sectors/track, 4078 cylinders, total 65519616 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/ubuntu--vg-root doesn't contain a valid partition table

Disk /dev/mapper/ubuntu--vg-swap_1: 9248 MB, 9248440320 bytes
255 heads, 63 sectors/track, 1124 cylinders, total 18063360 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/ubuntu--vg-swap_1 doesn't contain a valid partition table