How to connect to WiFi from the command line

• To see list of saved connections, use (<SavedWiFiConn>)

    nmcli c
  

• To see list of available WiFi hotspots (<WiFiSSID>)

    nmcli d wifi list
  

  or:

    sudo iwlist <WifiInterface> scanning
  

• To see list of interfaces (<WifiInterface>)

    ifconfig -a
  

  or

    ip link
  

Just change <WifiInterface>, <WiFiSSID>, <WiFiPassword> in the following commands to reflect your setup. If WiFi info already saved, easier way using <SavedWiFiConn> name of connection as it was saved in NetworkManager.

Ubuntu 16.04 and the following

##disconnect
nmcli d disconnect <WifiInterface>

##connect
nmcli d connect <WifiInterface>

Another way:

##disconnect
nmcli c down <SavedWiFiConn>

##connect
nmcli c up <SavedWiFiConn>

Ubuntu 15.10 & previous

##disconnect
nmcli d disconnect iface <WifiInterface>

##connect
nmcli d wifi connect <WiFiSSID> password <WiFiPassword> iface <WifiInterface>

Another way:

##disconnect:
nmcli c down id <SavedWiFiConn>

##connect:
nmcli c up id <SavedWiFiConn>

Tell to ask for password

If your password isn’t automatically recognized type this:

nmcli -a c up <SavedWiFiConn>

nmtui

sudo apt install network-manager