root开启权限

ubuntu中root开启伪分布式权限：

vim start-dfs.sh和vim stop-dfs.sh后均在开头插入

HDFS_DATANODE_USER=root
HDFS_DATANODE_SECURE_USER=hdfs
HDFS_NAMENODE_USER=root
HDFS_SECONDARYNAMENODE_USER=root

vim start-yarn.sh和vim stop-yarn.sh后均在开头插入

YARN_RESOURCEMANAGER_USER=root
HADOOP_SECURE_DN_USER=yarn
YARN_NODEMANAGER_USER=root