wlan0 not configured

[fhnaseer]

I followed the steps. But i got these errors. Any idea?,

pi@raspberrypi:~/PNP_RPi3_AP $ sudo ap mywifi somepass
[ ok ] Stopping hostapd (via systemctl): hostapd.service.
[ ok ] Stopping udhcpd (via systemctl): udhcpd.service.
ifdown: interface wlan0 not configured
RTNETLINK answers: File exists
ifup: failed to bring up wlan0
[ ok ] Restarting hostapd (via systemctl): hostapd.service.
[ ok ] Restarting udhcpd (via systemctl): udhcpd.service.
● hostapd.service - LSB: Advanced IEEE 802.11 management daemon
Loaded: loaded (/etc/init.d/hostapd; generated; vendor preset: enabled)
Active: active (running) since Wed 2017-10-11 08:04:57 UTC; 829ms ago
Docs: man:systemd-sysv-generator(8)
Process: 4171 ExecStop=/etc/init.d/hostapd stop (code=exited, status=0/SUCCESS
Process: 4333 ExecStart=/etc/init.d/hostapd start (code=exited, status=0/SUCCE
CGroup: /system.slice/hostapd.service
└─4338 /usr/sbin/hostapd -B -P /run/hostapd.pid /etc/hostapd/hostapd.

Oct 11 08:04:56 raspberrypi systemd[1]: Starting LSB: Advanced IEEE 802.11 manag
Oct 11 08:04:57 raspberrypi hostapd[4333]: Starting advanced IEEE 802.11 managem
Oct 11 08:04:57 raspberrypi systemd[1]: Started LSB: Advanced IEEE 802.11 manage

[nilipta]

I followed the steps. But i got these errors. Any idea?,

pi@raspberrypi:~/Music/hotspot $ sudo ap PNPtutorials pnptutorials
sudo: ap: command not found