More Networking Things

Our Raspbian specific networking stuff is here: https://raspberry-projects.com/pi/category/pi-operating-systems/raspbian/network-settings

IP Address

ip addr

Is A Specific Interface Connected

ip link show wlan0

WiFi

List discovered networks

sudo iwlist wlan0 scan

Is network connected

ifconfig wlan0

If the inet addr field has an address beside it, the RPi has connected to the network. 

Get connected network SSID

iwgetid wlan0 -r

Will return just the SSID, or blank if not connected.