diff --git a/.cheat/ssh b/.cheat/ssh
index e9a360d..a7c4db1 100644
--- a/.cheat/ssh
+++ b/.cheat/ssh
@@ -7,7 +7,7 @@ ssh -X user@example.com
 To launch a specific x application over SSH:
 ssh -X -t user@example.com 'chromium-browser'
 
-To ssh via pem file:
+To ssh via pem file (normally needs 0600 permissions):
 ssh -i /path/to/file.pem user@example.com
 
 For more information, see: