diff --git a/references/cli/system.go b/references/cli/system.go
index fec54a552..ea52781be 100644
--- a/references/cli/system.go
+++ b/references/cli/system.go
@@ -1,3 +1,19 @@
+/*
+Copyright 2021 The KubeVela Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 package cli
 
 import (
@@ -103,7 +119,7 @@ func NewSystemInfoCommand(c common.Args) *cobra.Command {
 	return cmd
 }
 
-// NewSystemDiagnoseCommand create command to help user to diagonse system's health
+// NewSystemDiagnoseCommand create command to help user to diagnose system's health
 func NewSystemDiagnoseCommand(c common.Args) *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "diagnose",