sudo , wifi connect command

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

  nmcli c
  

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

  nmcli d wifi list

sudo nmcli d wifi connect iSSA_ASUS_50_2.4G password 54098542 iface wlan0

Reference:

https://askubuntu.com/questions/461825/how-to-connect-to-wifi-from-the-command-line

www-data        ALL=(ALL) NOPASSWD: /usr/bin/amixer