Linux Manual WiFi WPA connect

#WPA WIFI Networking for Linux from the shell
#Manually 
sudo ip link set wlan0 up

#check if it's up
ip link show wlan0

#check if connected
iw wlan0 link

#scan networks
sudo /sbin/iw wlan0 scan
sudo /sbin/iw wlan0 scan|grep ESSID

#create key and config
wpa_passphrase  >> /etc/wpa_supplicant.conf
cat /etc/wpa_supplicant.conf

#connect
sudo wpa_supplicant -B -D wext -i wlan0 -c /etc/wpa_supplicant.conf

#check connection 
iw wlan0 link

#get ip settings
sudo dhclient wlan0

#check if connected
ip addr show wlan0
ping 8.8.8.8
ping google.com