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 l
  43 .Op Ar user
  44 .Sh DESCRIPTION
  45 .Nm Passwd
  46 changes the user's Kerberos password.  First, the user is prompted for their
  47 current password.
  48 If the current password is correctly typed, a new password is
  49 requested.
  50 The new password must be entered twice to avoid typing errors.
  51 .Pp
  52 The new password should be at least six characters long and not
  53 purely alphabetic.
  54 Its total length must be less than
  55 .Dv _PASSWORD_LEN
  56 (currently 128 characters).
  57 Numbers, upper case letters and meta characters
  58 are encouraged.
  59 .Pp
  60 Once the password has been verified,
  61 .Nm passwd
  62 communicates the new password information to
  63 the Kerberos authenticating host.
  64 .Bl -tag -width flag
  65 .It Fl l
  66 This option causes the password to be updated only in the local
  67 password file, and not with the Kerberos database.
  68 When changing only the local password,
  69 .Xr pwd_mkdb  8
  70 is used to update the password databases.
  71 .El
  72 .Pp
  73 To change another user's Kerberos password, one must first
  74 run
  75 .Xr kinit 1
  76 followed by
  77 .Xr passwd 1 .
  78 The super-user is not required to provide a user's current password
  79 if only the local password is modified.
  80 .Sh FILES
  81 .Bl -tag -width /etc/master.passwd -compact
  82 .It Pa /etc/master.passwd
  83 The user database
  84 .It Pa /etc/passwd
  85 A Version 7 format password file
  86 .It Pa /etc/passwd.XXXXXX
  87 Temporary copy of the password file
  88 .El
  89 .Sh SEE ALSO
  90 .Xr chpass 1 ,
  91 .Xr kerberos 1 ,
  92 .Xr kinit 1 ,
  93 .Xr login 1 ,
  94 .Xr passwd 5 ,
  95 .Xr kpasswdd 8 ,
  96 .Xr pwd_mkdb 8 ,
  97 .Xr vipw 8
  98 .Rs
  99 .%A Robert Morris
 100 .%A Ken Thompson
 101 .%T "UNIX password security"
 102 .Re
 103 .Sh HISTORY
 104 A
 105 .Nm passwd
 106 command appeared in
 107 .At v6 .