# ntfsusermap(8) - man - phpMan

[NTFSUSERMAP(8)](https://www.chedong.com/phpMan.php/man/NTFSUSERMAP/8/markdown)                         System Manager's Manual                        [NTFSUSERMAP(8)](https://www.chedong.com/phpMan.php/man/NTFSUSERMAP/8/markdown)



## NAME
       ntfsusermap - NTFS Building a User Mapping File

## SYNOPSIS
       **ntfsusermap** _windows-system-device_ **[**_other-ntfs-device_**...]**

       Where _windows-system-device_ is the device containing the Windows system whose users are to be
       mapped to current Linux system.

       And _other-ntfs-device_ is another device containing files which are to be accessed both by the
       Windows mentioned above and current Linux system.

       the  ntfsusermap  command  must  be  started  as root, and the designated devices must not be
       mounted.

       Typing ntfsusermap with no args will display a summary of command arguments.

## DESCRIPTION
       **ntfsusermap** creates the file defining the mapping of Windows accounts  to  Linux  logins  for
       users who owns files which should be visible from both Windows and Linux.

       It relies on existing files which were created on Windows, trying to locate significant files
       and asking which Linux user or group should own them. When a Linux  owner  or  group  is  re‐
       quested, the reply may be :

       - the uid or gid (numeric or symbolic) of Linux owner or group of the file.
              In that situation, no more file with the same Windows owner will be selected.
       - or no answer, when not able to define the owner or group.
              In that situation another file owned by the same Windows user or group may be selected
              later so that a mapping can be defined.

       The mappings for standard Windows users, such as "Administrator" or "All Users"  are  defined
       implicitly. As a consequence a user mapping should never be defined as Linux root.

       When  there  are no more significant files, ntfsusermap create the mapping file into the file
       UserMapping in the current directory. This file has to  be  moved  to  the  hidden  directory
       .NTFS-3G  in  the  root  of all the NTFS file systems to be shared between Windows and Linux.
       This requires the file system to be mounted, but the created file will not be taken into  ac‐
       count  if  not  present  at  mount  time, which means the file system has to be unmounted and
       mounted again for the new mapping file to be taken into account.

## OPTIONS
       No option is defined for ntfsusermap.

## EXAMPLES
       Map the users defined on the Windows system present on /dev/sda1 :

              **ntfsusermap** **/dev/sda1**


## EXIT CODES
       **ntfsusermap** exits with a value of 0 when no error was detected, and with a value of 1 when an
       error was detected.

## KNOWN ISSUES
       Please see

              <https://github.com/tuxera/ntfs-3g/wiki/NTFS-3G-FAQ/>

       for  common questions and known issues.  If you would find a new one in the latest release of
       the software then please send an email describing it in detail. You can contact the  develop‐
       ment team on the <ntfs-3g-devel@lists.sf.net> address.

## AUTHORS
       **ntfs-3g.secaudit** has been developed by Jean-Pierre André.

## THANKS
       Several  people made heroic efforts, often over five or more years which resulted the ntfs-3g
       driver. Most importantly they are Anton Altaparmakov, Richard  Russon,  Szabolcs  Szakacsits,
       Yura  Pakhuchiy,  Yuval Fledel, and the author of the groundbreaking FUSE filesystem develop‐
       ment framework, Miklos Szeredi.

## SEE ALSO
       [**ntfsprogs**(8)](https://www.chedong.com/phpMan.php/man/ntfsprogs/8/markdown), [**attr**(5)](https://www.chedong.com/phpMan.php/man/attr/5/markdown), [**getfattr**(1)](https://www.chedong.com/phpMan.php/man/getfattr/1/markdown)



ntfsusermap 1.2.0                           February 2016                             [NTFSUSERMAP(8)](https://www.chedong.com/phpMan.php/man/NTFSUSERMAP/8/markdown)