wifi not connecting problem in ubuntu

wifi_ubuntu_help.txt

sometimes in ubuntu the wifi will not connect to the network,
it will continiously try to connect to a wifi network but will fail 
continously. for this apply the following fix:

1. open terminal - > type in 'ifconfig' -> enter
    it will list the available networks like this:
    
    enp2s0    Link encap:Ethernet  
    lo        Link encap:Local Loopback 
    wlp3s0    Link encap:Ethernet  

2. now enter 'ifconfig wlp3s0 down'
    this command needs super user privilages so do use sudo.

3. now enter 'ifconfig wlp3s0 up'

now try connecting to the network.