1.\" Copyright (c) 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" %sccs.include.redist.roff% 5.\" 6.\" @(#)passwd.1 8.1 (Berkeley) 06/06/93 7.\" 8.Dd 9.Dt PASSWD 1 10.Os BSD 4 11.Sh NAME 12.Nm passwd 13.Nd modify a user's password 14.Sh SYNOPSIS 15.Nm passwd 16.Op Fl l 17.Op Ar user 18.Sh DESCRIPTION 19.Nm Passwd 20changes the user's Kerberos password. First, the user is prompted for their 21current password. 22If the current password is correctly typed, a new password is 23requested. 24The new password must be entered twice to avoid typing errors. 25.Pp 26The new password should be at least six characters long and not 27purely alphabetic. 28Its total length must be less than 29.Dv _PASSWORD_LEN 30(currently 128 characters). 31Numbers, upper case letters and meta characters 32are encouraged. 33.Pp 34Once the password has been verified, 35.Nm passwd 36communicates the new password information to 37the Kerberos authenticating host. 38.Bl -tag -width flag 39.It Fl l 40This option causes the password to be updated only in the local 41password file, and not with the Kerberos database. 42When changing only the local password, 43.Xr pwd_mkdb 8 44is used to update the password databases. 45.El 46.Pp 47To change another user's Kerberos password, one must first 48run 49.Xr kinit 1 50followed by 51.Xr passwd 1 . 52The super-user is not required to provide a user's current password 53if only the local password is modified. 54.Sh FILES 55.Bl -tag -width /etc/master.passwd -compact 56.It Pa /etc/master.passwd 57The user database 58.It Pa /etc/passwd 59A Version 7 format password file 60.It Pa /etc/passwd.XXXXXX 61Temporary copy of the password file 62.El 63.Sh SEE ALSO 64.Xr chpass 1 , 65.Xr kerberos 1 , 66.Xr kinit 1 , 67.Xr login 1 , 68.Xr passwd 5 , 69.Xr kpasswdd 8 , 70.Xr pwd_mkdb 8 , 71.Xr vipw 8 72.Rs 73.%A Robert Morris 74.%A Ken Thompson 75.%T "UNIX password security" 76.Re 77.Sh HISTORY 78A 79.Nm passwd 80command appeared in 81.At v6 . 82