HDFS

1. Hadoop  HDFS

//查看hdfs根目录下有哪些文件

hadoop fs -ls /

//在hdfs上创建多级文件夹

hadoop fs -mkdir -p /Upload/Files/

//把文件上传到hdfs指定的文件夹中

hadoop fs -put /opt/test.csv /Upload/Files

//运行测试mapreduce例子

hadoop jar /opt/hadoop-3.1.2/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.2.jar wordcount /file1  /user/root/wordcount2/

//

hdfs oev -p XML -i  edits_0000000000000000113-0000000000000000283 -o ./edits3.xml