# fdisk -l /dev/sda

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1           8       64228+  83  Linux
/dev/sda2             494       60801   484424010    5  Extended
/dev/sda3               9         493     3895762+  83  Linux
/dev/sda5             494         502       72261   83  Linux
/dev/sda6             503       60000   477917653+  83  Linux
/dev/sda7           60001       60801     6434001   83  Linux

Partition table entries are not in disk order