hadoop启动
``/hadoop-3.1.3/sbin/start-dfs.sh
``/hadoop-3.1.3/sbin/start-yarn.sh
查看所有命令
查看支持的所有命令：
hadoop fs
查看/目录下所有文件 [-ls [-C] [-d] [-h] [-q] [-R] [-t] [-S] [-r] [-u] [-e] [<path> ...]]
hadoop fs -ls /
新建文件夹 [-mkdir [-p] <path> ...]
hadoop fs -mkdir test
新建多级文件夹 [-mkdir [-p] <path> ...]
hadoop fs -mkdir -p test/abc/def
新建文件 [-touch [-a] [-m] [-t TIMESTAMP ] [-c] <path> ...]
hadoop fs -touch test/abc/def a.txt
从本地剪切到HDFS [-moveFromLocal <localsrc> ... <dst>]
hadoop fs -moveFromLocal test.txt test/abc/def
从本地粘贴到HDFS [-copyFromLocal [-f] [-p] [-l] [-d] [-t <thread count>] <localsrc> ... <dst>]
hadoop fs -copyFromLocal test.txt test/abc/def
从HDFS粘贴到本地 [-copyToLocal [-f] [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
hadoop fs -copyToLocal test/abc/def/test.txt ./
追加一个文件到已经存在的文件末尾 [-appendToFile <localsrc> ... <dst>]
hadoop fs -appendToFile test.txt test/abc/def/test.txt
查看文件内容 [-cat [-ignoreCrc] <src> ...]
hadoop fs -cat test/abc/def/test.txt
复制文件 [-cp [-f] [-p | -p[topax]] [-d] <src> ... <dst>]
hadoop fs -cp test/abc/def/test.txt test/abc/def/test2.txt
移动文件 [-mv <src> ... <dst>]
hadoop fs -mv test/abc/def/test.txt test/abc/qwe/
删除文件 [-rm [-f] [-r|-R] [-skipTrash] [-safely] <src> ...]
hadoop fs -rm -f test/abc/def/test2.txt
