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I tried to use the followings at '/etc/pam.d/system-auth' to restrict the account cannot reuse previous password.<br />
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password &nbsp; &nbsp;sufficient &nbsp; &nbsp;pam_unix.so md5 shadow nullok try_first_pass use_authtok remember=5<br />
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It works ok at the user account, but not for the 'root' account. Is it possible to restrict on 'root' as well ?
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I tried to use the followings at '/etc/pam.d/system-auth' to restrict the account cannot reuse previous password.

password    sufficient    pam_unix.so md5 shadow nullok try_first_pass use_authtok remember=5

It works ok at the user account, but not for the 'root' account. Is it possible to restrict on 'root' as well ?

RHEL5 - how to restrict cannot use previous password for 'root'

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