auto lo
iface lo inet loopback
iface wlan0 inet dhcp
wireless-key s:
wireless-essid vvasam
auto wlan0
I deleted the following lines in the interfaces file and started wireless connection.
auto lo
iface lo inet loopback
The following are the commands for starting wireless connection
sudo ifconfig wlan0 down
sudo ifconfig wlan0 up
sudo iwconfig wlan0 essid
