Fix /etc/hosts

packer/debian-stretch.json

@@ -105,7 +105,7 @@
     {
       "type": "file",
       "source": "hosts",
-      "destination": "/tmp/extra/etc/hosts"
+      "destination": "/etc/hosts.template"
     },
 	{
       "type": "shell",

packer/initramfs/labsync

@@ -199,7 +199,7 @@ PARTTABLE
 
 	hostname=$(ip -o link show | sed -ne 's#^.*link/ether \([0-9a-f:]*\).*$#\1#p' | sed -ne '1{s/://g;p}')
 	echo $hostname > ${rootmnt}/etc/hostname
-	sed -i "s/@@HOSTNAME@@/$hostname/" ${rootmnt}/etc/hosts
+	sed "s/@@HOSTNAME@@/$hostname/" ${rootmnt}/etc/hosts.template > ${rootmnt}/etc/hosts
 
 	if [ -z "$labsync_localboot" ]; then
 		labsync_set_environment LABSYNC "$torrent_name"