If shadow passwords are not being used on a system, the following things do not seem to work properly 1) logging in if you have an empty password. pam_pwdb reports 'get passwd; pwdb: request not recognized' in syslog 2) changing or deleting the password of an entity that currently does not have a password (either an 'empty password' or 'no password'). passwd reports success, but the contents of /etc/passwd are not changed
*** This bug has been marked as a duplicate of 3029 ***