#2990 Add document

docs/cn/msg_trace/user_guide.md

@@ -100,6 +100,19 @@ RocketMQ的消息轨迹特性支持两种存储轨迹数据的方式：
         ......
 ```
 
-
-
-
+### 4.4 使用mqadmin命令发送和查看轨迹
+- 发送消息
+```shell
+./mqadmin sendMessage -m true --topic some-topic-name -n 127.0.0.1:9876 -p "your meesgae content"
+```
+- 查询轨迹
+```shell
+./mqadmin QueryMsgTraceById -n 127.0.0.1:9876 -i "some-message-id"
+```
+- 查询轨迹结果
+```
+RocketMQLog:WARN No appenders could be found for logger (io.netty.util.internal.PlatformDependent0).
+RocketMQLog:WARN Please initialize the logger system properly.
+#Type      #ProducerGroup       #ClientHost          #SendTime            #CostTimes #Status
+Pub        1623305799667        xxx.xxx.xxx.xxx       2021-06-10 14:16:40  131ms      success
+```

docs/en/msg_trace/user_guide.md

@@ -101,5 +101,21 @@ Adjusting instantiation of DefaultMQProducer and DefaultMQPushConsumer as follow
 ```
 
 
+### 4.4 Send and query message trace by mqadmin command
+- send message
+```shell
+./mqadmin sendMessage -m true --topic some-topic-name -n 127.0.0.1:9876 -p "your meesgae content"
+```
+- query trace
+```shell
+./mqadmin QueryMsgTraceById -n 127.0.0.1:9876 -i "some-message-id"
+```
+- query trace result
+```
+RocketMQLog:WARN No appenders could be found for logger (io.netty.util.internal.PlatformDependent0).
+RocketMQLog:WARN Please initialize the logger system properly.
+#Type      #ProducerGroup       #ClientHost          #SendTime            #CostTimes #Status
+Pub        1623305799667        xxx.xxx.xxx.xxx       2021-06-10 14:16:40  131ms      success
+```