In My raspberry Pi wifi is connected to my home wifi and eth0 is assigned with a static ip address. It act as a router between wlan0 and eth0. Raspberry pi get internet through the wifi.
After modifying the wpa_supplicant.conf, i restarted the service networking using
sudo service networking restart. This restart the network but raspberry pi is not connected to the home wifi.
But it connects when we reboot the system.