diff --git a/scripts/.common b/scripts/.common
index 4742d30..928ee54 100644
--- a/scripts/.common
+++ b/scripts/.common
@@ -14,7 +14,7 @@ perror() {
 }
 
 sshcmd() {
-  ssh -o StrictHostKeyChecking=no $*
+  ssh -o StrictHostKeyChecking=no -o UserKnownHostFiles=/dev/null $*
 }
 
 dls() {