Updated Hadoop Compatible File System (markdown)

Hadoop-Compatible-File-System.md

@@ -61,6 +61,10 @@ Now you can do this:
 ```
 $ cd ${HADOOP_HOME}
 $ bin/hdfs dfs -ls /
+
+# if you did not set fs.defaultFS in etc/hadoop/core-site.xml
+# or you want to access a different SeaweedFS filer
+$ bin/hdfs dfs -ls seaweedfs://localhost:8888/
 ```
 
 # Installation for HBase