linux查看hdfs

Ⅰ hdfs block 在linux的哪個目錄

可以fdisk -l 看到 但是它本身是自己的文件系統 就是hdfs 你從linux本地是看不到的 想看裡面的文件可以使用如下命令 hadoop fs -ls！

Ⅱ HDFS用戶目錄對應Linux哪個目錄

可以fdisk -l 看到 但是它本身是自己的文件系統 就是hdfs 你從linux本地是看不到的 想看裡面的文件可以使用如下命令 hadoop fs -ls

Ⅲ hadoop操作命令記錄在哪

Hadoop自身是否有記錄不清楚，但Hadoop是部署在linux上的，可以通過linux的歷史命令查看。
1、history
2、fc -l
可以用grep過濾，例如：
history | grep 'hadoop'
或history | grep 'hdfs'

Ⅳ linux下怎麼知道hadoop安裝成功

驗證Hadoop是否安裝成功主要通過以下兩個網址。

http: //localhost:50030(MapRece的頁面)

http: //localhost:50070(HDFS的頁面)

如果都能查看，說明安裝成功。

一： 查看HDFS是否正常啟動。在瀏覽器中輸入http: //localhost:50070

以上界面為MapRece的管理界面，此界面表明MapRece的JobTracker已經正常啟動了。

Ⅳ Linux裡面hdfs作用是什麼

Hadoop分布式文件系統(HDFS)是指被設計成適合運行在通用硬體(commodity hardware)上的分布式文件系統（Distributed File System）。它和現有的分布式文件系統有很多共同點。但同時，它和其他的分布式文件系統的區別也是很明顯的。HDFS是一個高度容錯性的系統，適合部署在廉價的機器上。HDFS能提供高吞吐量的數據訪問，非常適合大規模數據集上的應用。HDFS放寬了一部分POSIX約束，來實現流式讀取文件系統數據的目的。HDFS在最開始是作為Apache Nutch搜索引擎項目的基礎架構而開發的。HDFS是Apache Hadoop Core項目的一部分。
HDFS有著高容錯性（fault-tolerant）的特點，並且設計用來部署在低廉的（low-cost）硬體上。而且它提供高吞吐量（high throughput）來訪問應用程序的數據，適合那些有著超大數據集（large data set）的應用程序。HDFS放寬了（relax）POSIX的要求（requirements）這樣可以實現流的形式訪問（streaming access）文件系統中的數據。

Ⅵ 查看hdfs各目錄分別佔用多少空間

[hadoop@slave3 java]$ hadoop fs -help
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...]
[-FromLocal [-f] [-p] [-l] <localsrc> ... <dst>]
[-ToLocal [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
[-count [-q] [-h] <path> ...]
[-cp [-f] [-p | -p[topax]] <src> ... <dst>]
[-createSnapshot <snapshotDir> [<snapshotName>]]
[-deleteSnapshot <snapshotDir> <snapshotName>]
[-df [-h] [<path> ...]]
[- [-s] [-h] <path> ...]
[-expunge]
[-get [-p] [-ignoreCrc] [-crc] <src> ... <localdst>]
[-getfacl [-R] <path>]
[-getfattr [-R] {-n name | -d} [-e en] <path>]
[-getmerge [-nl] <src> <localdst>]
[-help [cmd ...]]
[-ls [-d] [-h] [-R] [<path> ...]]
[-mkdir [-p] <path> ...]
[-moveFromLocal <localsrc> ... <dst>]
[-moveToLocal <src> <localdst>]
[-mv <src> ... <dst>]
[-put [-f] [-p] [-l] <localsrc> ... <dst>]
[-renameSnapshot <snapshotDir> <oldName> <newName>]
[-rm [-f] [-r|-R] [-skipTrash] <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> ...]
[-usage [cmd ...]]

-appendToFile <localsrc> ... <dst> :
Appends the contents of all the given local files to the given dst file. The dst
file will be created if it does not exist. If <localSrc> is -, then the input is
read from stdin.

-cat [-ignoreCrc] <src> ... :
Fetch all files that match the file pattern <src> and display their content on
stdout.

-checksum <src> ... :
Dump checksum information for files that match the file pattern <src> to stdout.
Note that this requires a round-trip to a datanode storing each block of the
file, and thus is not efficient to run on a large number of files. The checksum
of a file depends on its content, block size and the checksum algorithm and
parameters used for creating the file.

-chgrp [-R] GROUP PATH... :
This is equivalent to -chown ... :GROUP ...

-chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH... :
Changes permissions of a file. This works similar to the shell's chmod command
with a few exceptions.

-R modifies the files recursively. This is the only option currently
supported.
<MODE> Mode is the same as mode used for the shell's command. The only
letters recognized are 'rwxXt', e.g. +t,a+r,g-w,+rwx,o=r.
<OCTALMODE> Mode specifed in 3 or 4 digits. If 4 digits, the first may be 1 or
0 to turn the sticky bit on or off, respectively. Unlike the
shell command, it is not possible to specify only part of the
mode, e.g. 754 is same as u=rwx,g=rx,o=r.

If none of 'augo' is specified, 'a' is assumed and unlike the shell command, no
umask is applied.

-chown [-R] [OWNER][:[GROUP]] PATH... :
Changes owner and group of a file. This is similar to the shell's chown command
with a few exceptions.

-R modifies the files recursively. This is the only option currently
supported.

If only the owner or group is specified, then only the owner or group is
modified. The owner and group names may only consist of digits, alphabet, and
any of [-_./@a-zA-Z0-9]. The names are case sensitive.

WARNING: Avoid using '.' to separate user name and group though Linux allows it.
If user names have dots in them and you are using local file system, you might
see surprising results since the shell command 'chown' is used for local files.

-FromLocal [-f] [-p] [-l] <localsrc> ... <dst> :
Identical to the -put command.

-ToLocal [-p] [-ignoreCrc] [-crc] <src> ... <localdst> :
Identical to the -get command.

-count [-q] [-h] <path> ... :
Count the number of directories, files and bytes under the paths
that match the specified file pattern. The output columns are:
DIR_COUNT FILE_COUNT CONTENT_SIZE FILE_NAME or
QUOTA REMAINING_QUOTA SPACE_QUOTA REMAINING_SPACE_QUOTA
DIR_COUNT FILE_COUNT CONTENT_SIZE FILE_NAME
The -h option shows file sizes in human readable format.

-cp [-f] [-p | -p[topax]] <src> ... <dst> :
Copy files that match the file pattern <src> to a destination. When ing
multiple files, the destination must be a directory. Passing -p preserves status
[topax] (timestamps, ownership, permission, ACLs, XAttr). If -p is specified
with no <arg>, then preserves timestamps, ownership, permission. If -pa is
specified, then preserves permission also because ACL is a super-set of
permission. Passing -f overwrites the destination if it already exists. raw
namespace extended attributes are preserved if (1) they are supported (HDFS
only) and, (2) all of the source and target pathnames are in the /.reserved/raw
hierarchy. raw namespace xattr preservation is determined solely by the presence
(or absence) of the /.reserved/raw prefix and not by the -p option.

-createSnapshot <snapshotDir> [<snapshotName>] :
Create a snapshot on a directory

-deleteSnapshot <snapshotDir> <snapshotName> :
Delete a snapshot from a directory

-df [-h] [<path> ...] :
Shows the capacity, free and used space of the filesystem. If the filesystem has
multiple partitions, and no path to a particular partition is specified, then
the status of the root partitions will be shown.

-h Formats the sizes of files in a human-readable fashion rather than a number
of bytes.

- [-s] [-h] <path> ... :
Show the amount of space, in bytes, used by the files that match the specified
file pattern. The following flags are optional:

-s Rather than showing the size of each indivial file that matches the
pattern, shows the total (summary) size.
-h Formats the sizes of files in a human-readable fashion rather than a number
of bytes.

Note that, even without the -s option, this only shows size summaries one level
deep into a directory.

The output is in the form
size disk space consumed name(full path)

-expunge :
Empty the Trash

-get [-p] [-ignoreCrc] [-crc] <src> ... <localdst> :
Copy files that match the file pattern <src> to the local name. <src> is kept.
When ing multiple files, the destination must be a directory. Passing -p
preserves access and modification times, ownership and the mode.

-getfacl [-R] <path> :
Displays the Access Control Lists (ACLs) of files and directories. If a
directory has a default ACL, then getfacl also displays the default ACL.

-R List the ACLs of all files and directories recursively.
<path> File or directory to list.

-getfattr [-R] {-n name | -d} [-e en] <path> :
Displays the extended attribute names and values (if any) for a file or
directory.

-R Recursively list the attributes for all files and directories.
-n name Dump the named extended attribute value.
-d Dump all extended attribute values associated with pathname.
-e <encoding> Encode values after retrieving them.Valid encodings are "text",
"hex", and "base64". Values encoded as text strings are enclosed
in double quotes ("), and values encoded as hexadecimal and
base64 are prefixed with 0x and 0s, respectively.
<path> The file or directory.

-getmerge [-nl] <src> <localdst> :
Get all the files in the directories that match the source file pattern and
merge and sort them to only one file on local fs. <src> is kept.

-nl Add a newline character at the end of each file.

-help [cmd ...] :
Displays help for given command or all commands if none is specified.

-ls [-d] [-h] [-R] [<path> ...] :
List the contents that match the specified file pattern. If path is not
specified, the contents of /user/<currentUser> will be listed. Directory entries
are of the form:
permissions - userId groupId sizeOfDirectory(in bytes)
modificationDate(yyyy-MM-dd HH:mm) directoryName

and file entries are of the form:
permissions numberOfReplicas userId groupId sizeOfFile(in bytes)
modificationDate(yyyy-MM-dd HH:mm) fileName

-d Directories are listed as plain files.
-h Formats the sizes of files in a human-readable fashion rather than a number
of bytes.
-R Recursively list the contents of directories.

很簡單明了，前面的數字即為目錄所佔空間的大小，後面的因為我前期 備份數為3 後期改為2 所以可能會不一樣

Ⅶ linux中如何查看hadoop文件中的數據

namenode就是master。 必須要有一台啟動namenode服務。 ============= 如果只需要 datanode，那麼jps 命令後，查看到線程ID 然後kill 掉就好了。 注意 kill掉 namenode後，整個hadoop集群就宕掉了。

Ⅷ 怎麼查者、刪除、移動、拷貝HDFS上的文件

刪除復制移動文件命令

Linux代碼
rm -rf /file

-r：遞歸處理參數
-f：強制刪除所有文件

Linux代碼
cp /test1/file1 /test3/file2
將file1復制到test3下，並改名為file2

Linux代碼
cp -a test test1
將test目錄下的所有子目錄復制到test1下

Linux代碼
mv /test1/file1 /test2/test2

將file1移動到test2下，並改名為test2

Ⅸ 怎麼查看hdfs linux 路徑

可以fdisk -l 看到 但是它本身是自己的文件系統 就是hdfs 你從linux本地是看不到的 想看裡面的文件可以使用如下命令 hadoop fs -ls

Ⅹ Linux的hadoop運行hadoop的時候出現錯誤：找不到或者無法載入主類 org.apache.hadoop.fs.FsShell

Linux的hadoop運行hadoop的時候出現錯誤：找不到或者無法載入主類 org.apache.hadoop.fs.FsShell是設置錯誤造成的，解決方法為：

1、打開Vmware虛擬機，打開三個虛擬機。