File Browser
The File Browser application lets you browse and manipulate files and
directories in the Hadoop Distributed File System (HDFS) while using
Hue. With File Browser, you can:
- Create files and directories, upload and download files, upload zip
archives, and rename, move, and delete files and directories. You
can also change a file's or directory's owner, group, and
permissions. See Files and Directories.
- Search for files, directories, owners, and groups. See Searching
for Files and Directories.
- View and edit files as text or binary. See Viewing and Editing
Files.
File Browser Installation and Configuration
File Browser is one of the applications installed as part of Hue. For
information about installing and configuring Hue, see the Hue Installation
manual.
Starting File Browser
Click the File Browser icon
(
) in the navigation bar at the
top of the Hue browser page.
Files and Directories
You can use File Browser to view the input and output files of your
MapReduce jobs. Typically, you can save your output files in /tmp or in
your home directory if your system administrator set one up for you. You
must have the proper permissions to manipulate other user's files.
Creating Directories
- In the File Browser window, select New > Directory.
- In the Create Directory dialog box, enter a directory name and
then click Submit.
Changing Directories
- Click the directory name or parent directory dots in the File
Browser window.
- Click the
icon, type a directory name, and
press Enter.
To change to your home directory, click Home in the path field at
the top of the File Browser window.
Note:
The Home button is disabled if you do not have a home directory. Ask
a Hue administrator to create a home directory for you.
Creating Files
- In the File Browser window, select New > File.
- In the Create File dialog box, enter a file name and then click
Submit.
Uploading Files
You can upload text and binary files to the HDFS.
- In the File Browser window, browse to the directory where you
want to upload the file.
- Select Upload > Files.
- In the box that opens, click Upload a File to browse to and
select the file(s) you want to upload, and then click Open.
Copying a File
- In the File Browser window, check the checkbox next to the file
you want to copy.
- Click the
Copy button.
Downloading Files
You can download text and binary files to the HDFS.
- In the File Browser window, check the checkbox next to the file
you want to download.
- Click the Download button.
Uploading Zip Archives
You can upload zip archives to the HDFS. The archive is uploaded and
extracted to a directory named archivename.
- In the File Browser window, browse to the directory where you
want to upload the archive.
- Select Upload > Zip file.
- In the box that opens, click Upload a zip file to browse to and
select the archive you want to upload, and then click Open.
Trash Folder
File Browser supports the HDFS trash folder (home directory/.Trash) to
contain files and directories before they are permanently deleted. Files
in the folder have the full path of the deleted files (in order to be
able to restore them if needed) and checkpoints. The length of time a
file or directory stays in the trash depends on HDFS properties.
Open
- In the File Browser window, click
.
Move Files and Directories To
- In the File Browser window, check the checkbox next to one or
more files and directories.
- Select Delete > Move to trash.
Empty
- In the File Browser window, click
.
- Click Empty.
Renaming, Moving, Deleting, and Restoring Files and Directories
Rename
- In the File Browser window, check the checkbox next to the file
or directory you want to rename.
- Click the Rename button.
- Enter the new name and then click Submit.
Move
- In the File Browser window, check the checkbox next to the file
or directory you want to move.
- Click the Move button.
- In the Move dialog box, browse to or type the new directory, and
then click Submit.
Delete
- In the File Browser window, check the checkbox next to the file
or directory you want to delete. If you select a directory, all of
the files and subdirectories contained within that directory are
also deleted.
- Choose one of the following:
- Delete > Move to trash
- Delete > Delete forever
-
Click Yes to confirm. When you move a file to trash it is stored
in the .Trash folder in your home directory.
Restore
- In the File Browser window, open the .Trash folder.
- Navigate to the folder containing the file you want to restore.
- Check the checkbox next to the file.
- Click Restore.
Changing a File's or Directory's Owner, Group, or Permissions
Note:
Only the Hadoop superuser can change a file's or directory's owner,
group, or permissions. The user who starts Hadoop is the Hadoop
superuser. The Hadoop superuser account is not necessarily the same as a
Hue superuser account. If you create a Hue user (in User Admin) with the
same user name and password as the Hadoop superuser, then that Hue user
can change a file's or directory's owner, group, or permissions.
Owner or Group
- In the File Browser window, check the checkbox next to the
select the file or directory whose owner or group you want to
change.
- Choose Change Owner/Group from the Options menu.
- In the Change Owner/Group dialog box:
- Choose the new user from the User drop-down menu.
- Choose the new group from the Group drop-down menu.
- Check the Recursive checkbox to propagate the change.
-
Click Submit to make the changes.
Permissions
- In the File Browser window, check the checkbox next to the file
or directory whose permissions you want to change.
- Click the Change Permissions button.
- In the Change Permissions dialog box, select the permissions you
want to assign and then click Submit.
Searching for Files and Directories
To search for files or directories by name using the query search box,
enter the name of the file or directory in the query search box. File
Browser lists the files or directories matching the search criteria.
Viewing and Editing Files
You can view and edit files as text or binary.
View
- In the File Browser window, click the file you want to view.
File Browser displays the first 4,096 bytes of the file in the
File Viewer window.
- If the file is larger than 4,096 bytes, use the Block navigation
buttons (First Block, Previous Block, Next Block, Last Block) to
scroll through the file block by block. The Viewing Bytes
fields show the range of bytes you are currently viewing.
- To switch the view from text to binary, click View as Binary
to view a hex dump.
- To switch the view from binary to text, click View as Text.
Edit
- If you are viewing a text file, click Edit File. File Browser
displays the contents of the file in the File Editor window.
- Edit the file and then click Save or Save As to save the
file.
View Location in HDFS
Click View File Location. File Browser displays the file's location
in the File Browser window.