分散式系統詳解--框架（Hadoop-基本shell命令）

阿新 • • 發佈：2018-11-10

分散式系統詳解--框架（Hadoop-基本shell命令）

前面的文章我們已經將一個叢集搭建好了，現在就需要知道一些關於hadoop的基本操作命令，這篇文章就簡單介紹一下hadoop的基本操作shell命令。

一、安裝hadoop後，hadoop fs

在常用命令上進行了標註。

[[email protected] hadoop-2.7.5]# hadoop fs
Usage: hadoop fs [generic options]
        [-appendToFile <localsrc> ... <dst>]
        [-cat [-ignoreCrc] <src> ...]  //在終端顯示檔案內容
        [-checksum <src> ...]
        [-chgrp [-R] GROUP PATH...]
        [-chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH...]
        [-chown [-R] [OWNER][:[GROUP]] PATH...]
        [-copyFromLocal [-f] [-p] [-l] <localsrc> ... <dst>] 
        [-copyToLocal [-p] [-ignoreCrc] [-crc] <src> ... <localdst>] //複製到本地
        [-count [-q] [-h] <path> ...]  //顯示目錄中檔案數量
        [-cp [-f] [-p | -p[topax]] <src> ... <dst>] //複製多個檔案到目標目錄
        [-createSnapshot <snapshotDir> [<snapshotName>]]
        [-deleteSnapshot <snapshotDir> <snapshotName>]
        [-df [-h] [<path> ...]]
        [-du [-s] [-h] <path> ...] //顯示目錄檔案中所有檔案內容
        [-expunge]
        [-find <path> ... <expression> ...]
        [-get [-p] [-ignoreCrc] [-crc] <src> ... <localdst>] //複製檔案到本地，可以忽略crc校驗
        [-getfacl [-R] <path>]
        [-getfattr [-R] {-n name | -d} [-e en] <path>]
        [-getmerge [-nl] <src> <localdst>]   //將源目錄中的所有檔案排序合併到一個檔案中
        [-help [cmd ...]]
        [-ls [-d] [-h] [-R] [<path> ...]] // 顯示當前目錄所有檔案
        [-mkdir [-p] <path> ...] //建立資料夾
        [-moveFromLocal <localsrc> ... <dst>] //從本地中複製檔案到hdfs
        [-moveToLocal <src> <localdst>]
        [-mv <src> ... <dst>]  //移動多個檔案到目標目錄
        [-put [-f] [-p] [-l] <localsrc> ... <dst>]  //本地檔案複製到hdfs
        [-renameSnapshot <snapshotDir> <oldName> <newName>]
        [-rm [-f] [-r|-R] [-skipTrash] <src> ...] //刪除檔案
        [-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> ...] //在終端顯示檔案內容
        [-touchz <path> ...]  //建立一個空檔案
        [-truncate [-w] <length> <path> ...]
        [-usage [cmd ...]]

Generic options supported are
-conf <configuration file>     specify an application configuration file
-D <property=value>            use value for given property
-fs <local|namenode:port>      specify a namenode
-jt <local|resourcemanager:port>    specify a ResourceManager
-files <comma separated list of files>    specify comma separated files to be copied to the map reduce cluster
-libjars <comma separated list of jars>    specify comma separated jar files to include in the classpath.
-archives <comma separated list of archives>    specify comma separated archives to be unarchived on the compute machines.

The general command line syntax is
bin/hadoop command [genericOptions] [commandOptions]