ADDED   utils/homehost_check.sh
Index: utils/homehost_check.sh
==================================================================
--- /dev/null
+++ utils/homehost_check.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+#exits 1 when current host is not homehost.
+
+if [[ ! -e .homehost ]]; then
+    exit 0
+fi
+
+homehostname=$( host `cat .homehost` | awk '{print $NF}' | sed 's/\.$//' )
+hostname=$( hostname -f )
+
+if [[ $homehostname == $hostname ]]; then
+    exit 0
+fi
+echo "ERROR: this host ($homehostname) is not the megatest homehost ($hostname)"
+exit 1
+