02-20-2016
Login cancellation question
Purely out of curiosity, but what would happen in all accounts were locked out from being able to be logged in to?? The root account, on most unix-based systems, is locked by default. What if all other login-enabled accounts were changed to be login-disabled?? If such a thing were possible, would there be a possibility of using some way to gain control over the system without being able to login?? Or would the system and its contents be inaccessible?? This is pure curiosity. Obviously, I would never do this if it were possible.
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LEARN ABOUT HPUX
userstat
userstat(1M) userstat(1M)
NAME
userstat - check status of local user accounts
SYNOPSIS
[parm]...
[parm]...
DESCRIPTION
checks the status of local user accounts and reports abnormal conditions, such as account locks.
If any parm arguments are specified, abnormal status is displayed only for those parameters, otherwise abnormal status is displayed for all
parameters. The section describes the various parameter values that can be used for parm.
Each account with an abnormal status is displayed on a single line. Each line contains the username followed by one or more parameters,
indicating what abnormal conditions exist for the account. The section describes the various parameters that can be displayed.
Options
The following options are recognized:
Display the status of all users listed in
(Quiet) Do not print anything to standard output.
This can be used when interested only in the return value.
Check the status of only the specified user
name. The user must be a local user listed in
Parameters
The parameters that could be displayed to indicate abnormal account status, or that could be used with the option, include the following:
is displayed if an administrator lock is present on the account. This lock indicates that the encrypted password in or begins with An
administrator lock can be set, for example, with
is displayed if the account is locked because the account expiration
date has been reached. days is the number of days that the account has been expired. See the description of the expiration field
in shadow(4).
is displayed if the account's password has expired.
days is the number of days that the password has been expired. days is displayed only if its value can be determined.
is displayed if the account is locked because there have been no logins
to the account for a time interval that exceeds the maximum allowed. days is the number of days that the account has been inactive.
See the description of the attribute in security(4).
is displayed if the account is locked because the number of
consecutive authentication failures exceeded the maximum allowed. num is the number of consecutive authentication failures. See
the description of the attribute in security(4).
is displayed if the account is locked because the account has
a null password and is not allowed to have a null password. See the description of the attribute in security(4).
is displayed if the account has a time-of-day login restriction.
times defines the time periods that the user may login. See the description of the attribute in security(4).
Security Restrictions
Users invoking this command must have the authorization. See authadm(1M).
is not supported for trusted systems.
RETURN VALUE
exits with one of the following values:
did not find abnormal status
found abnormal status
invalid usage or user not found
EXAMPLES
The following example reports all abnormal status for all local accounts.
The following example shows that the account for user is not locked due to too many consecutive authentication failures.
FILES
standard password file
shadow password file
user database
SEE ALSO
authadm(1M), passwd(4), security(4), shadow(4), userdb(4).
userstat(1M)