Index: console/src/main/java/org/apache/karaf/shell/console/jline/Console.java
===================================================================
--- console/src/main/java/org/apache/karaf/shell/console/jline/Console.java	(revision 1203461)
+++ console/src/main/java/org/apache/karaf/shell/console/jline/Console.java	(working copy)
@@ -233,7 +233,11 @@
             catch (Throwable t)
             {
                 try {
-                    LOGGER.info("Exception caught while executing command", t);
+                    if (t instanceof CommandNotFoundException) {
+                        LOGGER.debug("Unknown command entered", t);
+                    } else {
+                        LOGGER.info("Exception caught while executing command", t);
+                    }
                     session.put(LAST_EXCEPTION, t);
                     if (t instanceof CommandException) {
                         session.getConsole().println(((CommandException) t).getNiceHelp());