do not consider network installs when not specified

install.py

@@ -15,6 +15,7 @@ import filecmp
 import re
 import types
 import socket
+import tempfile
 from pathlib import Path
 from subprocess import Popen, PIPE
 from ipaddress import IPv4Interface
@@ -520,9 +521,9 @@ def handle_config():
                 box.typ = 'bare-apu'
         elif box.typ == 'cm4':
             box.typ = 'dual-eth-rpi'
-            print('This is a cm4, so guess its a dual-eth-rpi - please check type in cfg file')
+            print('This is a cm4, so guess its a dual-eth-rpi - please check type in created cfg file')
         elif box.typ == 'cm3':
-            print('This is a cm3 so guess its a ionopimax  - please check type in cfg file')
+            print('This is a cm3 so guess its a ionopimax  - please check type in created cfg file')
             box.typ = 'ionopimax'
         template = TEMPLATES.get(box.typ)
         if template is None:
@@ -542,10 +543,9 @@ def handle_config():
         config = box.read_config()
         cfgfile = box.cfgfile
     if box.hostname_changed or box.hostname != newhostname:
-        print('changed', box.hostname, newhostname)
         box.hostname_changed = True
         if cfgfile:
-            newhostname = cfgfile.stem.rpartition('_')[0]
+            newhostname = cfgfile.stem.split('_')[0]
         if doit:
             print('bash sethostname.sh')
             unix_cmd('bash', f'{TOOLS}/sethostname.sh')
@@ -561,6 +561,7 @@ def handle_config():
     ifname = ''
     try:
         netcfg = config.get('NETWORK', {})
+        if netcfg:  # when not network is specified, do not handle network at all
             for name in netcfg:
                 if name not in box.network_interfaces:
                     print(f'{name} is not a valid network interface name')

utils.py

@@ -115,7 +115,7 @@ class BoxInfo:
                         break
         if not cfgfiles:
             cfgfiles = list(self.CFGDIR.glob(f'*_{self.id:06x}.cfg*'))
-            self.oldcfg = True
+            self.oldcfg = bool(cfgfiles)
         if len(cfgfiles) > 1:
             raise AmbiguousConfigFile('ambiguous cfgfile: %r' % cfgfiles)
         if section and not cfgfiles: