Annotation of src/usr.bin/passwd/passwd.1, Revision 1.39
1.39 ! tedu 1: .\" $OpenBSD: passwd.1,v 1.38 2014/04/24 19:07:54 jmc Exp $
1.9 aaron 2: .\"
1.1 deraadt 3: .\" Copyright (c) 1990 The Regents of the University of California.
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1.1 deraadt 15: .\" may be used to endorse or promote products derived from this software
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1.39 ! tedu 32: .Dd $Mdocdate: April 24 2014 $
1.1 deraadt 33: .Dt PASSWD 1
1.8 aaron 34: .Os
1.1 deraadt 35: .Sh NAME
36: .Nm passwd
37: .Nd modify a user's password
38: .Sh SYNOPSIS
39: .Nm passwd
1.32 biorn 40: .Op Fl K | l | y
1.1 deraadt 41: .Op Ar user
42: .Sh DESCRIPTION
1.13 aaron 43: .Nm
1.39 ! tedu 44: changes the user's local or YP password.
1.9 aaron 45: First, the user is prompted for their current password.
1.13 aaron 46: If the current password is correctly typed, a new password is requested.
1.1 deraadt 47: The new password must be entered twice to avoid typing errors.
48: .Pp
49: The new password should be at least six characters long and not
50: purely alphabetic.
51: Its total length must be less than
52: .Dv _PASSWORD_LEN
53: (currently 128 characters).
1.13 aaron 54: A mixture of both lower and uppercase letters, numbers, and
55: meta-characters is encouraged.
1.12 provos 56: .Pp
1.18 millert 57: The quality of the password can be enforced by specifying an external
58: checking program via the
59: .Dq passwordcheck
60: variable in
61: .Xr login.conf 5 .
1.9 aaron 62: .Pp
63: The options are as follows:
1.14 aaron 64: .Bl -tag -width Ds
1.1 deraadt 65: .It Fl l
1.13 aaron 66: Causes the password to be updated only in the local password file.
1.9 aaron 67: When changing only the local password,
68: .Xr pwd_mkdb 8
1.1 deraadt 69: is used to update the password databases.
1.6 art 70: .It Fl y
1.7 aaron 71: Forces the YP password database entry to be changed, even if
1.9 aaron 72: the user has an entry in the local database.
73: The
1.6 art 74: .Xr rpc.yppasswdd 8
75: daemon should be running on the YP master server.
76: .El
77: .Pp
1.39 ! tedu 78: If no flags are specified and the password is not in the local password
! 79: database, then an attempt is made to use the YP database.
1.1 deraadt 80: .Pp
1.11 aaron 81: The superuser is not required to provide a user's current password
1.1 deraadt 82: if only the local password is modified.
1.4 provos 83: .Pp
84: Which type of cipher is used to encrypt the password information
85: depends on the configuration in
1.18 millert 86: .Xr login.conf 5 .
87: It can be different for local
1.30 jmc 88: .Pq Dq localcipher
1.18 millert 89: and YP
1.30 jmc 90: .Pq Dq ypcipher
1.18 millert 91: passwords.
1.28 millert 92: If none is specified, then blowfish with 6 rounds is used for local
1.30 jmc 93: .Pq Dq localcipher
1.28 millert 94: and old is used for YP
1.30 jmc 95: .Pq Dq ypcipher
1.28 millert 96: by default.
1.25 jmc 97: .Sh FILES
98: .Bl -tag -width /etc/master.passwd -compact
99: .It /etc/login.conf
100: configuration options
101: .It Pa /etc/master.passwd
102: user database
103: .It Pa /etc/passwd
1.34 jmc 104: user database, with confidential information removed
1.25 jmc 105: .It Pa /etc/passwd.XXXXXX
106: temporary copy of the password file
107: .It /etc/ptmp
108: lock file for the passwd database
109: .El
1.13 aaron 110: .Sh DIAGNOSTICS
111: .Bl -diag
1.35 schwarze 112: .It "Attempting to lock password file, please wait or press ^C to abort"
1.20 millert 113: .Pp
114: The password file is currently locked by another process;
115: .Nm
116: will keep trying to lock the password file until it succeeds or
1.23 deraadt 117: you hit the interrupt character (control-C by default).
1.20 millert 118: If
119: .Nm
1.35 schwarze 120: is interrupted while trying to gain the lock the password change will
1.20 millert 121: be lost.
122: .Pp
123: If the process holding the lock was prematurely terminated the lock
124: file may be stale and
125: .Nm
126: will wait forever trying to lock the password file.
127: To determine whether a live process is actually holding the lock, the
1.18 millert 128: admin may run the following:
129: .Bd -literal -offset indent
1.22 mpech 130: $ fstat /etc/ptmp
1.18 millert 131: .Ed
132: .Pp
133: If no process is listed, it is safe to remove the
1.13 aaron 134: .Pa /etc/ptmp
1.20 millert 135: file to clear the error.
1.1 deraadt 136: .El
137: .Sh SEE ALSO
138: .Xr chpass 1 ,
1.36 tedu 139: .Xr encrypt 1 ,
1.1 deraadt 140: .Xr login 1 ,
1.18 millert 141: .Xr login.conf 5 ,
1.1 deraadt 142: .Xr passwd 5 ,
143: .Xr pwd_mkdb 8 ,
144: .Xr vipw 8
145: .Rs
1.16 deraadt 146: .%A Robert Morris
147: .%A Ken Thompson
1.37 schwarze 148: .%T Password security: a case history
149: .%J Communications of the ACM
150: .%V Volume 22
151: .%N Issue 11
152: .%D Nov. 1979
153: .%P 594\(en597
1.1 deraadt 154: .Re
155: .Sh HISTORY
156: A
1.13 aaron 157: .Nm
1.1 deraadt 158: command appeared in
1.21 mickey 159: .At v3 .
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