ubuntu@ubuntu:~$ sudo fdisk -l /dev/hda

Disk /dev/hda: 20.4 GB, 20416757760 bytes
255 heads, 63 sectors/track, 2482 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1        2377    19093221   83  Linux
/dev/hda2            2378        2482      843412+   5  Extended
/dev/hda5            2378        2482      843381   82  Linux swap / Solaris