diff --git a/cfg/linse-box2_5b2a64.cfg b/cfg/linse-box2_5b2a64.cfg
new file mode 100644
index 0000000..a157bab
--- /dev/null
+++ b/cfg/linse-box2_5b2a64.cfg
@@ -0,0 +1,10 @@
+[NETWORK]
+; please refer to README.md for help
+eth0=wan
+eth1=192.168.2.2
+eth2=192.168.3.3
+eth3=192.168.127.254
+
+[ROUTER]
+; please refer to README.md for help
+3001=192.168.127.254:3001
diff --git a/install.py b/install.py
index 9353f24..5027db2 100755
--- a/install.py
+++ b/install.py
@@ -475,6 +475,8 @@ def handle_config():
         cfgfile = BoxInfo.CFGPATH % (newhostname, box.id)
         with open(cfgfile, 'w') as f:
             f.write(template)
+        config = box.read_config()
+        cfgfile = box.cfgfile
     if box.hostname_changed or cfgfile != BoxInfo.CFGPATH % (newhostname, box.id):
         box.hostname_changed = True
         if cfgfile:
diff --git a/utils.py b/utils.py
index cd00ad0..0c154fc 100644
--- a/utils.py
+++ b/utils.py
@@ -56,10 +56,14 @@ class BoxInfo:
 
     def read_config(self, section=None):
         cfgfiles = glob(self.CFGPATH % ('*', self.id))
-        if len(cfgfiles) != 1:
-            raise ValueError('there must be one and only one single cfgfile %r' % cfgfiles)
+        if len(cfgfiles) > 1:
+            raise ValueError('ambiguous cfgfile: %r' % cfgfiles)
+        if section and not cfgfiles:
+            raise ValueError('no cfg file found for %s' % self.id)
         if cfgfiles:
             self.cfgfile = cfgfiles[0]
+        else:
+            return {}
         parser = ConfigParser()
         parser.read(self.cfgfile)
         if section: