Thank you, now I am the root user, but I have a problem when you create a new WiFi network, have offered to Access Point mode for your USB wifi. My USB wifi is: MAREL High Power WiFi Wireless LAN USB Adapter with 5dB antenna for Raspberry Pi Model B +, B and A, Banana Pi, BeagleBone, etc (300kbit / s, IEEE 802.11b / g / n, WEP / WPA / WPA2 ). Linux recognizes it as Realtek RTL 8191SU WLAN Adapter