- 启动hdfs
namenode格式化：bin/hdfs namenode -format
启动namenode：sbin/hadoop-daemon.sh start namenode
启动datanode：sbin/hadoop-daemon.sh start datanode
jps命令检查是否启动
- 在hdfs中建立文件夹
bin/hdfs dfs -mkdir -p /user/myname/input
- 查看hdfs根目录下文件夹
bin/hdfs dfs -ls /
bin/hdfs dfs -lsr /
- 上传本地文件到hdfs
bin/hdfs dfs -put wcinput/wc.input /user/myname/input
- 执行MR
bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.2.jar wordcount /user/myname/input /user/myname/output
