passwd.tproj/passwd.1

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  32 .\"     @(#)passwd.1    8.1 (Berkeley) 6/6/93
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  34 .Dd June 6, 1993
  35 .Dt PASSWD 1
  36 .Os BSD 4
  37 .Sh NAME
  38 .Nm passwd
  39 .Nd modify a user's password
  40 .Sh SYNOPSIS
  41 .Nm passwd
  42 .Op Fl i Ar infosystem
  43 .Op Fl l Ar location
  44 .Op Fl u Ar authname
  45 .Op Ar name
  46 .Sh DESCRIPTION
  47 .Nm Passwd
  48 changes the user's password.
  49 First, the user is prompted for their current password.
  50 If the current password is correctly typed,
  51 a new password is requested.
  52 The new password must be entered twice,
  53 to detect (and avoid accepting) typing errors.
  54 .Pp
  55 The new password should be at least six characters long
  56 and not purely alphabetic.
  57 Its total length should be less than
  58 .Dv _PASSWORD_LEN
  59 (currently 128 characters),
  60 although some infosystems allow longer passwords.
  61 Numbers, upper-case letters, and meta characters
  62 are encouraged.
  63 .Pp
  64 Once the password has been verified,
  65 .Nm passwd
  66 communicates the new password information to
  67 the authenticating host.
  68 .Bl -tag -width flag
  69 .It Fl i Ar infosystem
  70 This option specifies where the password update should be applied.
  71 Under Mac OS X 10.5, supported infosystems are:
  72 .Bl -tag -width flag
  73 .It Ar opendirectory
  74 (default)
  75 A system conforming to opendirectory APIs and supporting updates
  76 (including LDAP, etc).
  77 If no -l option is specified, the search node is used.
  78 .It Ar file
  79 The local flat-files (included for legacy configurations).
  80 .It Ar nis
  81 A remote NIS server containing the user's password.
  82 .El
  83 .It Fl l Ar location
  84 This option causes the password to be updated in the given location
  85 of the chosen infosystem.
  86 .Bl -tag -width flag
  87 .It for file,
  88 location may be a file name (/etc/master.passwd is the default)
  89 .It for nis,
  90 location may be a NIS domainname
  91 .It for opendirectory,
  92 location may be a directory node name
  93 .El
  94 .It Fl u Ar authname
  95 This option specifies the username to use when authenticating to
  96 the directory node.
  97 .El
  98 .Pp
  99 The super-user privileges are not required
 100 to change a user's current password,
 101 if only the local password is modified.
 102 .Sh FILES
 103 .Bl -tag -width /etc/master.passwd -compact
 104 .It Pa /etc/master.passwd
 105 The user database
 106 .It Pa /etc/passwd
 107 A Version 7 format password file
 108 .It Pa /etc/passwd.XXXXXX
 109 Temporary copy of the password file
 110 .El
 111 .Sh SEE ALSO
 112 .Xr chpass 1 ,
 113 .Xr login 1 ,
 114 .Xr dscl 1 ,
 115 .Xr passwd 5 ,
 116 .Xr pwd_mkdb 8 ,
 117 .Xr vipw 8
 118 .Rs
 119 .%A Robert Morris
 120 .%A Ken Thompson
 121 .%T "UNIX password security"
 122 .Re
 123 .Sh HISTORY
 124 A
 125 .Nm passwd
 126 command appeared in
 127 .At v6 .