【Hadoop学习之HDFS】_06HDFS的shell操作

一、基本语法

bin/hadoop fs 具体命令
#或者
bin/hdfs dfs 具体命令

注意：其中dfs是fs的实现类

二、命令大全

[hadoop@SZMaster01 hadoop-2.8.3]$ bin/hadoop fs
Usage: hadoop fs [generic options]
        [-appendToFile <localsrc> ... <dst>]
        [-cat [-ignoreCrc] <src> ...]
        [-checksum <src> ...]
        [-chgrp [-R] GROUP PATH...]
        [-chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH...]
        [-chown [-R] [OWNER][:[GROUP]] PATH...]
        [-copyFromLocal [-f] [-p] [-l] [-d] <localsrc> ... <dst>]
        [-copyToLocal [-f] [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
        [-count [-q] [-h] [-v] [-t [<storage type>]] [-u] [-x] <path> ...]
        [-cp [-f] [-p | -p[topax]] [-d] <src> ... <dst>]
        [-createSnapshot <snapshotDir> [<snapshotName>]]
        [-deleteSnapshot <snapshotDir> <snapshotName>]
        [-df [-h] [<path> ...]]
        [-du [-s] [-h] [-x] <path> ...]
        [-expunge]
        [-find <path> ... <expression> ...]
        [-get [-f] [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
        [-getfacl [-R] <path>]
        [-getfattr [-R] {-n name | -d} [-e en] <path>]
        [-getmerge [-nl] [-skip-empty-file] <src> <localdst>]
        [-help [cmd ...]]
        [-ls [-C] [-d] [-h] [-q] [-R] [-t] [-S] [-r] [-u] [<path> ...]]
        [-mkdir [-p] <path> ...]
        [-moveFromLocal <localsrc> ... <dst>]
        [-moveToLocal <src> <localdst>]
        [-mv <src> ... <dst>]
        [-put [-f] [-p] [-l] [-d] <localsrc> ... <dst>]
        [-renameSnapshot <snapshotDir> <oldName> <newName>]
        [-rm [-f] [-r|-R] [-skipTrash] [-safely] <src> ...]
        [-rmdir [--ignore-fail-on-non-empty] <dir> ...]
        [-setfacl [-R] [{-b|-k} {-m|-x <acl_spec>} <path>]|[--set <acl_spec> <path>]]
        [-setfattr {-n name [-v value] | -x name} <path>]
        [-setrep [-R] [-w] <rep> <path> ...]
        [-stat [format] <path> ...]
        [-tail [-f] <file>]
        [-test -[defsz] <path>]
        [-text [-ignoreCrc] <src> ...]
        [-touchz <path> ...]
        [-truncate [-w] <length> <path> ...]
        [-usage [cmd ...]]

三、常用命令

-help：输出这个命令参数

[hadoop@SZMaster01 hadoop-2.8.3]$ hadoop fs -help rm

-ls: 显示目录信息

[hadoop@SZMaster01 hadoop-2.8.3]$ hadoop fs -ls /

-mkdir：在HDFS上创建目录

[hadoop@SZMaster01 hadoop-2.8.3]$ hadoop fs -mkdir /test202001

-moveFromLocal：从本地剪切粘贴到HDFS

[hadoop@SZMaster01 hadoop-2.8.3]$ touch test.txt
[hadoop@SZMaster01 hadoop-2.8.3]$ hadoop fs -moveFromLocal ./test.txt /test202001/test.txt

-appendToFile：追加一个文件到已经存在的文件末尾

[hadoop@SZMaster01 hadoop-2.8.3]$ hadoop fs -appendToFile ./zhuijia.txt /test01.txt

-cat：显示文件内容

[hadoop@SZMaster01 hadoop-2.8.3]$ hadoop fs -cat /test01.txt

-chgrp 、-chmod、-chown：Linux文件系统中的用法一样，修改文件所属权限
- chgrp：改变文件所属群组
- chown：改变文件拥有者
- chmod：改变文件的权限
-copyFromLocal：从本地文件系统中拷贝文件到HDFS路径去
-copyToLocal：从HDFS拷贝到本地
-cp ：从HDFS的一个路径拷贝到HDFS的另一个路径
-mv：在HDFS目录中移动文件
-get：等同于copyToLocal，就是从HDFS下载文件到本地
-getmerge：合并下载多个文件
-put：等同于copyFromLocal
-tail：显示一个文件的末尾
-rm：删除文件或文件夹
-rmdir：删除空目录
-du统计文件夹的大小信息
-setrep：设置HDFS中文件的副本数量

来源：CSDN

作者：easy_sir

链接：https://blog.csdn.net/qq_40947493/article/details/104134656

标签

HDFS

Hadoop

hdfs命令