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    Names: »pass.chk«

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TextFile

.TH PASS.CHK 1 "Feb 4, 1992"
.UC 4
.SH NAME
pass.chk  \- Checks for poor passwords in a password file.
.SH SYNOPSIS
.B pass.chk
[
options
]
.SH DESCRIPTION
By default
.I pass.chk
only checks for accounts with passwords the same
as the login name. The following options add more extensive checking. (The
tradeoff is cpu time -- with all options enabled it can run into the 100's
of MINUTES.) Any argument that does not begin with a "-" is assumed to be
a file name. (A single '-' means stdin.) If no file name is given, /etc/passwd
is used.
.PP
Options are:
.TP
.B \-v
verbose -- list all guesses on stdout
.TP
.B \-u
output the username on the line of the password file
currently being checked. If the program stops
abruptly you will then know how far it got.
.TP
.B \-w file
use the list of words contained in "file" as likely
passwords. Words in the file are one to a line.
A variable, "ARB_CONST", on line 6 of the source file, "pass.c",
determines how many words can be in the dictionary file.  Default is 32000.
.TP
.B \-b
check all guesses backwards too
.TP
.B \-g
use the Full Name portion of the gecos field, the user's .plan, .forward,
and .signature files to generate more guesses
.TP
.B \-s
check the single letters a-z, A-Z, 0-9 as passwords
.TP
.B \-c
with each guess, check for all lower case and
all upper case versions too.
.TP
.B \-n
complain about null passwords (default is to keep quiet)
.TP
.B \-p
print the password when guessed
.TP
.B \-P file
use an alternate password file
.PP
If used on a Sun or Sun compatible, compiling with the -DC2 flag will
enable C2/shadow passwords to be cracked (it must be run as root, however,
to read the shadow password file.)
.SH FILES
.br
.nf
/etc/passwd
.fi