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简单介绍常用hadoop dfs命令
source link: https://www.linuxprobe.com/hadoop-dfs-cmand.html
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创建目录
hadoop dfs -mkdir /home
上传文件或目录到hdfs
hadoop dfs -put hello / hadoop dfs -put hellodir/
查看目录
hadoop dfs -ls /
创建一个空文件
hadoop dfs -touchz /361way
删除一个文件
hadoop dfs -rm /361way
删除一个目录
hadoop dfs -rmr /home
重命名
hadoop dfs -mv /hello1 /hello2
查看文件
hadoop dfs -cat /hello
将制定目录下的所有内容merge成一个文件，下载到本地
hadoop dfs -getmerge /hellodir wa
使用du文件和目录大小
hadoop dfs -du /
将目录拷贝到本地
hadoop dfs -copyToLocal /home localdir
查看dfs的情况
hadoop dfsadmin -report
查看正在跑的Java程序
jps
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