diff --git a/install.py b/install.py
index d6130a8..a6dfbbe 100755
--- a/install.py
+++ b/install.py
@@ -10,7 +10,7 @@ import shutil
 from glob import glob
 from ipaddress import IPv4Interface
 from configparser import ConfigParser
-from os.path import join, getmtime, exists
+from os.path import join, getmtime, exists, basename
 
 os.chdir('/root/aputools/to_system')
 
@@ -41,7 +41,6 @@ def create_if(name, cfg, mac):
         PROXY_METHOD='none',
         BROWSER_ONLY='no',
         IPV4_FAILURE_FATAL='yes',
-        UUID='58d61ced-05d2-4726-a8f7-%s' % ''.join(mac.split(':')),
         IPV6INIT='no')
     if cfg == 'off':
         result['ONBOOT']='no'
@@ -154,7 +153,7 @@ def network(doit):
     for ntry in range(1 + bool(doit)):
         with open('/etc/hostname') as f:
             hostname = f.read().strip()
-        if hostname == cfgfile[:-7]:  # stripped apuid from cfgfile
+        if cfgfile == CFGPATH % ('%s_%6.6x' % (hostname, apuid)):
             break
         if doit:
             if ntry == 0:
@@ -163,7 +162,9 @@ def network(doit):
                 print('ERROR: can not set host name')
                 return False
         else:
-            print('host name does not match')
+            if cfgfile:
+                print('host name does not match %r -> %r' % (hostname, basename(cfgfile).rpartition('_')[0]))
+                show.dirty = True
             break
     if cfgfile is None:
         return False
@@ -178,6 +179,7 @@ def network(doit):
             todo = write_when_new('/etc/sysconfig/network-scripts/ifcfg-%s' % ifname, content, doit)
             if todo:
                 print('change ', ifname)
+                show.dirty = True
     except Exception as e:
         print('ERROR: can not handle %s %s: %r' % (hostname, ifname, e))
         return False
diff --git a/servercfg/apumaster_591fac.cfg b/servercfg/apumaster_591fac.cfg
index 5ed07d3..a9de8a7 100644
--- a/servercfg/apumaster_591fac.cfg
+++ b/servercfg/apumaster_591fac.cfg
@@ -1,9 +1,9 @@
 [NETWORK]
 address=00:0d:b9:59:1f:ac
-enp1s0=dhcp
+enp1s0=192.168.127.1/24
 enp2s0=192.168.2.1/24
 enp3s0=192.168.3.1/24
-enp4s0=192.168.127.1/24
+enp4s0=dhcp
 
 [ROUTER]
 3000=/dev/ttyUSB0
diff --git a/sethostname.sh b/sethostname.sh
index edd8843..70ac614 100644
--- a/sethostname.sh
+++ b/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
diff --git a/to_system/etc/sysconfig/network-scripts/ifcfg-enp1s0 b/to_system/etc/sysconfig/network-scripts/ifcfg-enp1s0
deleted file mode 100644
index 7a3aa5c..0000000
--- a/to_system/etc/sysconfig/network-scripts/ifcfg-enp1s0
+++ /dev/null
@@ -1,8 +0,0 @@
-TYPE=Ethernet
-NAME=enp1s0
-DEVICE=enp1s0
-BOOTPROTO=none
-ONBOOT=yes
-IPADDR=192.168.2.1
-NETMASK=255.255.255.0
-PREFIX=24
diff --git a/to_system/etc/sysconfig/network-scripts/ifcfg-enp2s0 b/to_system/etc/sysconfig/network-scripts/ifcfg-enp2s0
deleted file mode 100644
index 749bd14..0000000
--- a/to_system/etc/sysconfig/network-scripts/ifcfg-enp2s0
+++ /dev/null
@@ -1,8 +0,0 @@
-TYPE=Ethernet
-NAME=enp2s0
-DEVICE=enp2s0
-BOOTPROTO=none
-ONBOOT=yes
-IPADDR=192.168.2.2
-NETMASK=255.255.255.0
-PREFIX=24
diff --git a/to_system/etc/sysconfig/network-scripts/ifcfg-enp3s0 b/to_system/etc/sysconfig/network-scripts/ifcfg-enp3s0
deleted file mode 100644
index edde62a..0000000
--- a/to_system/etc/sysconfig/network-scripts/ifcfg-enp3s0
+++ /dev/null
@@ -1,8 +0,0 @@
-TYPE=Ethernet
-NAME=enp3s0
-DEVICE=enp3s0
-BOOTPROTO=none
-ONBOOT=yes
-IPADDR=192.168.2.3
-NETMASK=255.255.255.0
-PREFIX=24
diff --git a/to_system/etc/sysconfig/network-scripts/ifcfg-enp4s0 b/to_system/etc/sysconfig/network-scripts/ifcfg-enp4s0
deleted file mode 100644
index 33eeb64..0000000
--- a/to_system/etc/sysconfig/network-scripts/ifcfg-enp4s0
+++ /dev/null
@@ -1,5 +0,0 @@
-TYPE=Ethernet
-NAME=enp4s0
-DEVICE=enp4s0
-BOOTPROTO=dhcp
-ONBOOT=yes