1CHNTPW(8)                   System Manager's Manual                  CHNTPW(8)
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NAME

6       chntpw - utility to overwrite Windows NT/2000 SAM passwords
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SYNOPSIS

9       chntpw  [options]  <samfile> [systemfile] [securityfile] [otherreghive]
10       [...]
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DESCRIPTION

13       This manual page documents briefly the  chntpw  command.   This  manual
14       page  was written for the Debian distribution because the original pro‐
15       gram does not have a manual page.
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17       chntpw is a utility to view some information and change user  passwords
18       in a Windows NT/2000 SAM userdatabase file. It is not necessary to know
19       the old passwords to reset them.  In addition it contains a simple reg‐
20       istry  editor  (same  size  data  writes) and hex-editor with which the
21       information contained in a registry file can be browsed and modified.
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OPTIONS

24       -h     Show summary of options.
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26       -u username
27              Username to change. Default is Administrator
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29       -l     List all users in the SAM database.
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31       -i     Interactive: list all users (as per -l) and  then  ask  for  the
32              user to change.
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34       -e     Registry editor with limited capabilities.
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36       -d     Use buffer debugger.
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38       -t     Show hexdumps of structs/segments (deprecated debug function).
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EXAMPLES

41       chntpw sam system
42              Opens  registry  hives  sam  and system and change administrator
43              account. This will work even if the name has been changed or  it
44              has  been localized (since different language versions of NT use
45              different administrator names).
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47       chntpw -u jabbathehutt mysam
48              Prompts for password for jabbathehutt  and  changes  it  in  the
49              mysam registry file, if found (otherwise do nothing)
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SEE ALSO

52       If  you  are  looking for an automated procedure for password recovery,
53       you might look at the bootdisks provided  by  the  upstream  author  at
54       http://home.eunet.no/~pnordahl/ntpasswd/
55       There  is  more  information  on  how  this  program works available at
56       /usr/share/doc/chntpw.  This information includes in-depth  information
57       on how the registry works, what are syskeys and some other issues.
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AUTHOR

60       This  manual  page  was  written by Javier Fernandez-Sanguino <jfs@com‐
61       puter.org>, for the Debian GNU/Linux system (but may be  used  by  oth‐
62       ers).
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66                                30th May  2002                       CHNTPW(8)