12-17-2007
if you can become root then you can become any user.
so
sudo su -
(you are now root)
su - userid
(you are now userid)
CTRL-d
(you are now root)
su - otheruserid
(you are now otheruserid)
if you get errors when "becoming" another user check /etc/passwd and make sure that a valid shell is set for that user
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LEARN ABOUT NETBSD
pam_login_access
PAM_LOGIN_ACCESS(8) BSD System Manager's Manual PAM_LOGIN_ACCESS(8)
NAME
pam_login_access -- login.access PAM module
SYNOPSIS
[service-name] module-type control-flag pam_login_access [options]
DESCRIPTION
The login.access service module for PAM provides functionality for only one PAM category: account management. In terms of the module-type
parameter, this is the ``account'' feature.
Login.access Account Management Module
The login.access account management component (pam_sm_acct_mgmt()), returns success if and only if the user is allowed to log in on the spec-
ified tty (in the case of a local login) or from the specified remote host (in the case of a remote login), according to the restrictions
listed in /etc/login.access.
SEE ALSO
login.access(5), pam.conf(5), pam(8)
AUTHORS
The login.access(5) access control scheme was designed and implemented by Wietse Venema.
The pam_login_access module and this manual page were developed for the FreeBSD Project by ThinkSec AS and NAI Labs, the Security Research
Division of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 (``CBOSS''), as part of the DARPA CHATS research program.
BSD
January 24, 2002 BSD