Ordinary users upgrade hdfs rights

reference:

https://www.cnblogs.com/silgogo/p/10677752.html

[root@manager ~]# groupadd supergroup
[root@manager ~]# usermod -a -G supergroup feng.feng
[root@manager ~]# su - hdfs -s /bin/bash -c "hdfs dfsadmin -refreshUserToGroupsMappings"
Refresh user to groups mapping successful