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The Windows version of usermap is available as a zip compressed file. You first have to unzip the file into some directory and you only need the file usermap.exe. This is generally done by double-clicking the icon associated to file tools.zip and selecting the said file for extraction. The source file is available in the same archive and advanced-ntfs-3g.md5 file on the download page can be used to check its authenticity.
There is currently no graphical version of usermap, so to start it, you must open a cmd window. To do this, click Start, then Run, type cmd and click ok. In the window type cd followed by the directory into which usermap.exe was saved.
A simple way to get a Windows account parameter, when being logged
account, is to start usermap with no argument but
redirecting the output to a mapping file.
Doing so, you then have to edit the file with your favourite Windows
editor (or Wordpad), replacing the words user and group
by the Linux login which corresponds to the Windows account, then
rename the file as \.NTFS-3G\UserMapping, in the root
directory of the volume to make accessible to Linux (for example as e:\.NTFS-3G\UserMapping
for volume e:). You can also do this on
Linux, but you must first mount the volume, then edit the file (for
example /ntfs/.NTFS-3G/UserMapping if the NTFS volume
is mounted into /ntfs), then you must unmount the
volume and mount again to activate the mapping.
Be sure to capitalize the directory .NTFS-3G and
file name UserMapping correctly, even on Windows.
If either is not correctly capitalized, it will not be recognized
If you have several accounts to map, repeat the process under
Windows for each account and concatenate the outputs in a single file.
Another possibility is to scan one or more volumes for file owners,
by indicating the volumes as arguments to usermap. These volumes need
not have to be shared with Linux, but they have to contain files which
have been created on Windows by users who have a corresponding login.
Whenever possible, the Windows system disk should be indicated first,
because this disk generally contains the root directories of all users
as subdirectories of c:\Documents and Settings and c:\Users. If
volume to share with Linux is not the Windows system disk, it should be
indicated as the second argument. Thus the output will be written at
the desired location \.NTFS-3G\UserMapping.
Whenever usermap finds a new owner of a file, it asks for the login of the corresponding Linux owner of the file.
Volumes just formatted and volumes which only contain files created
the base ntfs-3g will obviously bring no clue for file owners. They
may nevertheless be indicated next to Windows system volume to receive
the mapping output.
Do not reply (just depress "enter") if the file does not belong to a
user who should be mapped. You will not be asked again about the same
user owning another file on the same volume.
Type the Linux login or group name (or numeric id) if the owner or
group should be mapped.
The resulting mapping file is ready for use into the volume designated as the second argument (the one designated as first argument if there is no more).
Note : the mapping file is specific to a volume. If several volumes
have to be shared, the file has to be replicated on each of them.
On Linux, usermap is named ntfs-3g.usermap
as a part of the ntfs-3g
package, and it
started once the
package has been installed. There are two other conditions to be
before doing so :
The screens may look similar to those of the Windows version, however,
as Linux has no knowledge of Windows
accounts, there is no indication of current Windows account and fewer
indications of names
of owners of files. So the owners have generally to be determined from
The resulting mapping file is written on file
UserMapping in the current directory. For the file to
be usable, first
mount the volume, then copy UserMapping to /.NTFS-3G/UserMapping
mounted directory, then unmount the volume and mount it again.
If your NTFS volume is to be used on Linux only, with no connection to
any Windows system, you can use your favourite random number generator
to generate your SID. Just copy the pattern below, replace the digits
by a number
above 1000 and the blue ones by a sequence of three numbers not greater
This line defines a generic pattern to be used to create SIDs
for users and groups. It has void login and
group fields, and must be located at the end of the file.
Files declared as readable by anybody will still be readable on any Windows system though the owner and group are not recognized.