Linux (redhat) how to change password to previous password

Question

Is there a way to change password to value same as the previous password? I know this is a security flaw, but would like to know however.

when I try this:

[mrbean@wwwserver ~]$ passwd
Changing password for user mrbean.
Changing password for mrbean
(current) UNIX password: 
New UNIX password: -- here i typed same password
BAD PASSWORD: is too similar to the old one.

Answer 1

Either enter the password as root, or modify the PAM configuration to relax the password requirements. Either way, this is something that only root can do.

Answer 2

or change it to something else, then change it back to same one...