NAME
pwck, grpck — password/group file checkers
SYNOPSIS
/usr/sbin/pwck
[-l]
[password
[shadow]]
/usr/sbin/pwck
[-s]
[-l]
[password]
/usr/sbin/grpck
[file]
DESCRIPTION
pwck
scans fields in the password and shadow files
and reports any inconsistencies to standard error.
The checks include validation of the number of fields,
login name, user ID, group ID,
and whether the login directory and optional program exist.
In addition, if the root entry shows a program, it can only
be one of:
/sbin/sh,
/usr/bin/csh,
/usr/bin/ksh,
or
/usr/bin/sh.
The criteria for validation is in
passwd
and
shadow,
and is described in the
Managing Systems and Workgroups
manual.
The default password file is
/etc/passwd.
The default shadow file is
/etc/shadow.
For additional verification, use
pwconv,
to check consistency between entries in the password and shadow files.
grpck
verifies all entries in the group file
and reports any inconsistencies to standard error.
This verification includes a check of the number of fields,
group name, group ID, and whether all login names appear
in the password file.
The default group file is
/etc/group.
Options
pwck
recognizes the following options:
- -s
Check inconsistencies with the Protected Password database.
It calls
authck
-p.
- -l
Check encrypted password lengths that are greater than 8 characters.
If
NIS+
is running in Trusted mode, password lengths must not be
longer than 8 characters.
DIAGNOSTICS
Group entries in
/etc/group
with no login names are flagged.
WARNINGS
Successful password file validation is not sufficient for proper
system operation.
To help maintain consistency with other system databases,
editing of the password file with
vipw
is discouraged.
HP recommends that you use
sam,
useradd,
usermod,
userdel,
chfn,
chsh
or
passwd
to edit
/etc/passwd.
DEPENDENCIES
NFS
pwck
and
grpck
check only the local password, shadow and group files.
The Network Information Service database is not checked.
AUTHOR
pwck
was developed by AT&T and HP.
FILES
/etc/group
/etc/passwd
/etc/shadow
STANDARDS CONFORMANCE
pwck: SVID2, SVID3
grpck: SVID2, SVID3
