找不到或org.apache.hadoop.fs.FsShell

我明白這個問題可能已經被回答，以及加載主類，我的問題還在這裏：找不到或org.apache.hadoop.fs.FsShell

我有一個虛擬機Hadoop的建立在VMware使用CentOS7，我就可以開始NameNode和DataNode會，但是，當我嘗試使用下面的命令來查看HDFS文件：

hdfs dfs -ls

它拋出如下的錯誤：

Could not find or load main class org.apache.hadoop.fs.FsShell

我的谷歌Searchin的GS認爲這可能涉及到Hadoop的變量在bash設置，這裏是我的設置：

# .bashrc 
# Source global definitions 
if [ -f /etc/bashrc ]; then 
. /etc/bashrc 
fi 
export HADOOP_HOME=/opt/hadoop/hadoop-2.7.2 
export HADOOP_MAPRED_HOME=$HADOOP_HOME 
export HADOOP_COMMON_HOME=$HADOOP_HOME 
export HADOOP_HDFS_HOME=$HADOOP_HOME 
export HADOOP_YARN_HOME=$HADOOP_HOME 
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop 
export HADOOP_PREFIX=$HADOOP_HOME 

export HIVE_HOME=/opt/hadoop/hive 
export PATH=$HIVE_HOME/bin:$PATH 

export ANT_HOME=/usr/local/apache-ant-1.9.7 
export PATH=${PATH}:${JAVA_HOME}/bin 

export PIG_HOME=/opt/hadoop/pig-0.15.0 
export PIG_HADOOP_VERSION=0.15.0 
export PIG_CLASSPATH=$HADOOP_HOME/etc/hadoop 

export PATH=$PATH:$PIG_HOME/bin 
export PATH=$PATH:$HADOOP_HOME/bin 
export HADOOP_USER_CLASSPATH_FIRST=true 

export SQOOP_HOME=/usr/lib/sqoop 
export PATH=$PATH:$SQOOP_HOME/bin 

export HADOOP_CLASSPATH=$HADOOP_HOME/share/hadoop/common/ 
export PATH=$PATH:$HADOOP_CLASSPATH 

# Uncomment the following line if you don't like systemctl's auto-paging feature 
: 
# export SYSTEMD_PAGER= 
# User specific aliases and functions

我檢查了我的Hadoop文件夾：/opt/hadoop/hadoop-2.7.2/share/hadoop/common，這裏是列表：