diff -Nru ubuntu-core-config-0.6.40+ppa18/debian/changelog ubuntu-core-config-0.6.40+ppa19/debian/changelog
--- ubuntu-core-config-0.6.40+ppa18/debian/changelog	2016-10-20 13:44:15.000000000 +0000
+++ ubuntu-core-config-0.6.40+ppa19/debian/changelog	2016-10-22 10:41:36.000000000 +0000
@@ -1,3 +1,9 @@
+ubuntu-core-config (0.6.40+ppa19) xenial; urgency=medium
+
+  * add some missing sync calls
+
+ -- Michael Vogt <michael.vogt@ubuntu.com>  Sat, 22 Oct 2016 12:41:27 +0200
+
 ubuntu-core-config (0.6.40+ppa18) xenial; urgency=medium
 
   * fix netplan networkd config
diff -Nru ubuntu-core-config-0.6.40+ppa18/usr/lib/snapd/generate-network-conf ubuntu-core-config-0.6.40+ppa19/usr/lib/snapd/generate-network-conf
--- ubuntu-core-config-0.6.40+ppa18/usr/lib/snapd/generate-network-conf	2016-10-20 13:44:02.000000000 +0000
+++ ubuntu-core-config-0.6.40+ppa19/usr/lib/snapd/generate-network-conf	2016-10-22 10:42:48.000000000 +0000
@@ -51,6 +51,8 @@
 # may not even installed at this point.
 /usr/sbin/netplan generate
 
+sync
+
 if [ ! -e /etc/netplan/00-default-nm-renderer.yaml ]; then
     /usr/sbin/netplan apply
 fi
diff -Nru ubuntu-core-config-0.6.40+ppa18/usr/lib/snapd/sshd-host-keygen ubuntu-core-config-0.6.40+ppa19/usr/lib/snapd/sshd-host-keygen
--- ubuntu-core-config-0.6.40+ppa18/usr/lib/snapd/sshd-host-keygen	2016-09-06 06:34:34.000000000 +0000
+++ ubuntu-core-config-0.6.40+ppa19/usr/lib/snapd/sshd-host-keygen	2016-10-22 10:43:09.000000000 +0000
@@ -46,6 +46,7 @@
 			restorecon "$file" "$file.pub"
 		fi
 		ssh-keygen -l -f "$file.pub"
+                sync
 	fi
 }