The following is a demonstration of pam_happy_hour. Here we login during happy hour with the username "fred", and just hit enter for the password, $ telnet jupiter Trying 192.168.1.15... Connected to jupiter. Escape character is '^]'. Jupiter. Authorized users only. login: fred Password: Welcome to happy hour! Last login: Sun Mar 6 22:31:51 from localhost Sun Microsystems Inc. SunOS 5.10 s10_63 May 2004 $ Normally it would be a "Login incorrect", however during happy hour any password is accepted for any account. Now we try the same login when it isn't happy hour, telnet jupiter Trying 192.168.1.15... Connected to jupiter. Escape character is '^]'. Jupiter. Authorized users only. login: fred Password: This isn't happy hour. Login incorrect Jupiter. Authorized users only. login: