Make it more clear that they have to check it on ops...

account/quotamail.in

@@ -35,9 +35,11 @@ you could clean up your directory it would be appreciated.
 
 You can check your usage with the 'quota' command on @USERNODE@:
 
-> quota -v -l
+@USERNODE@> quota -v -l
 `quota -v -l $i`
 
+(Note: This will not work from nodes in an experiment.)
+
 The directory trees where you most likely have files are:
 Project directory:    @FSDIR_PROJ@
 Group directory:      @FSDIR_GROUPS@