do not set UUID

+ other fixes

sethostname.sh

@@ -1,10 +1,14 @@
 ETHNAME=$(cat /sys/class/net/enp1s0/address)
-FOUND=$(grep -H address=$ETHNAME /root/aputools/servercfg/*.cfg)
+ETHNAME=${ETHNAME//:/}
+APUID=${ETHNAME: -6}
+FOUND=( /root/aputools/servercfg/*_$APUID.cfg )
 if [ -z "$FOUND" ]; then
-   ETHNAME=${ETHNAME//:/}
-   HOSTNAME=apu${ETHNAME:6:6}
+   HOSTNAME=apu$APUID
 else
-   FOUND=$(basename $FOUND)  # remove directory part
-   HOSTNAME=${FOUND%%.*}  # remove extension and all the rest
+   FOUND=$(basename ${FOUND[0]})  # remove directory part
+   HOSTNAME=${FOUND%%.*}  # remove extension
+   if [ $HOSTNAME != "apu$APUID" ]; then
+       HOSTNAME=${HOSTNAME%_*}
+   fi
 fi
 echo $HOSTNAME > /etc/hostname