+else
+ifdef PLCHOSTLXC
+SSHURL:=root@$(PLCHOSTLXC):/var/lib/lxc/$(GUESTNAME)/rootfs
+SSHCOMMAND:=ssh root@$(PLCHOSTLXC) ssh $(GUESTHOSTNAME)
+else
+ifdef PLCHOSTVS
+SSHURL:=root@$(PLCHOSTVS):/vservers/$(GUESTNAME)
+SSHCOMMAND:=ssh root@$(PLCHOSTVS) vserver $(GUESTNAME) exec
+endif
+endif
+endif
+
+synccheck:
+ifeq (,$(SSHURL))
+ @echo "sync: I need more info from the command line, e.g."
+ @echo " make sync PLC=boot.planetlab.eu"
+ @echo " make sync PLCHOSTVS=.. GUESTNAME=.."
+ @echo " make sync PLCHOSTLXC=.. GUESTNAME=.. GUESTHOSTNAME=.."
+ @exit 1