安装hadoop，错误: 找不到或无法加载主类 org.apache.hadoop.hdfs.server.namenode.NameNode

hdfs namenode -format没有权限

会报错，前边加个sudo就好了

sudo hdfs namenode -format

hadoop $ hdfs namenode -format
错误: 找不到或无法加载主类 org.apache.hadoop.hdfs.server.namenode.NameNode
:hadoop $ hdfs namenode -format
错误: 找不到或无法加载主类 org.apache.hadoop.hdfs.server.namenode.NameNode
tripleone:hadoop fwj$ export HADOOP_CLASSPATH=$(cygpath -pw $(hadoop classpath)):$HADOOP_CLASSPATH
-bash: cygpath: command not found
tripleone:hadoop fwj$ sudo hdfs namenode -format
Password:
18/01/11 13:13:01 INFO namenode.NameNode: STARTUP_MSG: 
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   user = root
STARTUP_MSG:   host = tripleone.local/10.235.146.27
STARTUP_MSG:   args = [-format]
STARTUP_MSG:   version = 2.8.2
STARTUP_MSG:   classpath = /usr/local/Cellar/hadoop/2.8.2/libexec/etc/hadoop:/usr/local/Cellar/hadoop/2.8.2/libexec/share/hadoop/common/lib/activation-1.1.jar:/usr/local/Cellar/hadoop/2.8.2/libexec/share/hadoop/common/lib/apacheds-i18n-2.0.0-M15.jar:/u