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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.
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up vote 5 down vote accepted

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.

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

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Unless something like pam_pwhistory is in use. – Dennis Williamson Apr 14 '10 at 21:33

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