See available wireless access points in the terminal?

You can use the command:

sudo iwlist wlan0 scan

This assumes that wlan0 is your wireless interface. To find out if it is or not type sudo iwconfig which will give you a list of your network interfaces and tell you which ones have wireless extensions enabled.

I know this is a six years old question and its already answered but i went in the same problem on a debian system and use this command:

nmcli dev wifi list