MAC_ADDRESS=`cat /sys/class/net/eth0/address | tr -d ':' | cut -c7-12`
sed -i '/^ssid=/d' /etc/hostapd/hostapd.conf
sed -i '$a ssid='prefix_${MAC_ADDRESS}'' /etc/hostapd/hostapd.conf
MAC_ADDRESS=`cat /sys/class/net/eth0/address | tr -d ':' | cut -c7-12`
sed -i '/^ssid=/d' /etc/hostapd/hostapd.conf
sed -i '$a ssid='prefix_${MAC_ADDRESS}'' /etc/hostapd/hostapd.conf