3.1.9 /etc/security/user - histsize

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Defines the number of previous passwords that a user may not reuse.

In setting the histsize attribute, it enforces a minimum number of previous passwords a user cannot reuse.


In /etc/security/user, set the default user stanza histsize attribute to be greater than or equal to 20-

chsec -f /etc/security/user -s default -a histsize=20

This means that a user may not reuse any of the previous 20 passwords.

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