It is recommended that before walking away from a console where a PAM timestamp is active, the timestamp file be destroyed. To do this from within a graphical environment, click on the authentication icon on the panel. When a dialog box appears, click on the Forget Authorization button.

If logged into a system remotely using ssh, use the /sbin/pam_timestamp_check -k root command to destroy the timestamp file.

For information about destroying the timestamp file using pam_timestamp_check, refer to the pam_timestamp_check man page.