I am trying to do a hotspot with my raspberry pi 3 (Raspbian 9.3). I follow this tutorial : https://null-byte.wonderhowto.com/how-to/turn-your-raspberry-pi-into-wireless-hotspot-0180133/
I use hostapd and dnsmasq. I have a problem on step 3 when I need to set a static ip to wlan0.
$ sudo ifup wlan0 Error: inet prefix is expected rather than "192.168.197,1/255.255.255.0". ifup: failed to bring up wlan0
My /etc/network/interface is
source-directory /etc/network/interfaces.d auto lo iface lo inet loopback auto eth0 allow-hotplug eth0 iface eth0 inet dhcp allow-hotplug wlan0 iface wlan0 inet static address 192.168.197,1 netmask 255.255.255.0 network 192.168.197.0 broadcast 192.168.197.255