Usage:?hdfs dfs -appendToFile <localsrc> ... <dst>
追加一个或者多个文件到hdfs制定文件中.也可以从命令行读取输入.
Exit Code:
Returns 0 on success and 1 on error.
Usage:?hdfs dfs -cat URI [URI ...]
查看内容.
Example:
Exit Code:
Returns 0 on success and -1 on error.
Usage:?hdfs dfs -chgrp [-R] GROUP URI [URI ...]
修改所属组.
Options
Usage:?hdfs dfs -chmod [-R] <MODE[,MODE]... | OCTALMODE> URI [URI ...]
修改权限.
Options
Usage:?hdfs dfs -chown [-R] [OWNER][:[GROUP]] URI [URI ]
修改所有者.
Options
Usage:?hdfs dfs -copyFromLocal <localsrc> URI
Similar to put command, except that the source is restricted to a local file reference.
Options:
Usage:?hdfs dfs -copyToLocal [-ignorecrc] [-crc] URI <localdst>
Similar to get command, except that the destination is restricted to a local file reference.
Usage:?hdfs dfs -count [-q] [-h] <paths>
列出文件夹数量、文件数量、内容大小. The output columns with -count are: DIR_COUNT, FILE_COUNT, CONTENT_SIZE FILE_NAME
The output columns with -count -q are: QUOTA, REMAINING_QUATA, SPACE_QUOTA, REMAINING_SPACE_QUOTA, DIR_COUNT, FILE_COUNT, CONTENT_SIZE, FILE_NAME
The -h option shows sizes in human readable format.
Example:
Exit Code:
Returns 0 on success and -1 on error.
Usage:?hdfs dfs -cp [-f] [-p | -p[topax]] URI [URI ...] <dest>
复制文件(夹)，可以覆盖，可以保留原有权限信息
Options:
Example:
Exit Code:
Returns 0 on success and -1 on error.
Usage:?hdfs dfs -du [-s] [-h] URI [URI ...]
显示文件(夹)大小.
Options:
Example:
Exit Code: Returns 0 on success and -1 on error.
Usage:?hdfs dfs -dus <args>
Displays a summary of file lengths.
Note:?This command is deprecated. Instead use?hdfs dfs -du -s.
Usage:?hdfs dfs -expunge
清空回收站.
Usage:?hdfs dfs -get [-ignorecrc] [-crc] <src> <localdst>
Copy files to the local file system. Files that fail the CRC check may be copied with the -ignorecrc option. Files and CRCs may be copied using the -crc option.
Example:
Exit Code:
Returns 0 on success and -1 on error.
Usage:?hdfs dfs -getfacl [-R] <path>
显示权限信息.
Options:
Examples:
Exit Code:
Returns 0 on success and non-zero on error.
Usage:?hdfs dfs -getfattr [-R]?-n name | -d?[-e en] <path>
Displays the extended attribute names and values (if any) for a file or directory.
Options:
Examples:
Exit Code:
Returns 0 on success and non-zero on error.
Usage:?hdfs dfs -getmerge <src> <localdst> [addnl]
合并.
Usage:?hdfs dfs -ls [-R] <args>
Options:
For a file returns stat on the file with the following format:
permissions number_of_replicas userid groupid filesize modification_date modification_time filename
For a directory it returns list of its direct children as in Unix. A directory is listed as:
permissions userid groupid modification_date modification_time dirname
Example:
Exit Code:
Returns 0 on success and -1 on error.
Usage:?hdfs dfs -lsr <args>
Recursive version of ls.
Note:?This command is deprecated. Instead use?hdfs dfs -ls -R
Usage:?hdfs dfs -mkdir [-p] <paths>
Takes path uri‘s as argument and creates directories.
Options:
Example:
Exit Code:
Returns 0 on success and -1 on error.
Usage:?hdfs dfs -moveFromLocal <localsrc> <dst>
Similar to put command, except that the source localsrc is deleted after it‘s copied.
Usage:?hdfs dfs -moveToLocal [-crc] <src> <dst>
Displays a "Not implemented yet" message.
Usage:?hdfs dfs -mv URI [URI ...] <dest>
Moves files from source to destination. This command allows multiple sources as well in which case the destination needs to be a directory. Moving files across file systems is not permitted.
Example:
Exit Code:
Returns 0 on success and -1 on error.
Usage:?hdfs dfs -put <localsrc> ... <dst>
Copy single src, or multiple srcs from local file system to the destination file system. Also reads input from stdin and writes to destination file system.
Exit Code:
Returns 0 on success and -1 on error.
Usage:?hdfs dfs -rm [-f] [-r|-R] [-skipTrash] URI [URI ...]
Delete files specified as args.
Options:
Example:
Exit Code:
Returns 0 on success and -1 on error.
Usage:?hdfs dfs -rmr [-skipTrash] URI [URI ...]
Recursive version of delete.
Note:?This command is deprecated. Instead use?hdfs dfs -rm -r
Usage:?hdfs dfs -setfacl [-R] [-b|-k?-m|-x <acl_spec>?<path>]|[--set <acl_spec> <path>]
Sets Access Control Lists (ACLs) of files and directories.
Options:
Examples:
Exit Code:
Returns 0 on success and non-zero on error.
Usage:?hdfs dfs -setfattr?-n name [-v value] | -x name?<path>
Sets an extended attribute name and value for a file or directory.
Options:
Examples:
Exit Code:
Returns 0 on success and non-zero on error.
Usage:?hdfs dfs -setrep [-R] [-w] <numReplicas> <path>
Changes the replication factor of a file. If?path?is a directory then the command recursively changes the replication factor of all files under the directory tree rooted at?path.
Options:
Example:
Exit Code:
Returns 0 on success and -1 on error.
Usage:?hdfs dfs -stat URI [URI ...]
Returns the stat information on the path.
Example:
Exit Code: Returns 0 on success and -1 on error.
Usage:?hdfs dfs -tail [-f] URI
Displays last kilobyte of the file to stdout.
Options:
Example:
Exit Code: Returns 0 on success and -1 on error.
Usage:?hdfs dfs -test -[ezd] URI
Options:
Example:
Usage:?hdfs dfs -text <src>
Takes a source file and outputs the file in text format. The allowed formats are zip and TextRecordInputStream.
Usage:?hdfs dfs -touchz URI [URI ...]
Create a file of zero length.
Example:
Exit Code: Returns 0 on success and -1 on error.
原文：https://www.cnblogs.com/starzy/p/10530338.html