root@vikashruhil-Inspiron-1440:/home/vikash-ruhil# fdisk -l

Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 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: 0x00074510

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048   156391423    78194688   83  Linux
/dev/sda2       156393470   390766591   117186561    5  Extended
/dev/sda3       470638592   623093759    76227584   83  Linux
/dev/sda4       390766592   470638591    39936000   83  Linux
/dev/sda5       238313472   390766591    76226560   83  Linux
/dev/sda6       156395520   238313471    40958976   83  Linux

Partition table entries are not in disk order