To properly set the owner of /etc/security/opasswd, run the command: $ sudo chown root /etc/security/opasswd
To properly set the group owner of /etc/security/opasswd, run the command: $ sudo chgrp root /etc/security/opasswd
To properly set the permissions of /etc/security/opasswd, run the command: $ sudo chmod 0600 /etc/security/opasswd