python setup.py install

edit psz.conf to match local configuration

(as root) cp psz.conf /usr/local/etc/psz.conf
(as root) chown named /usr/local/etc/psz.conf
(as root) chmod 700 /usr/local/etc/psz.conf

% psz help
Python Secure Zone

commands:

  status             shows the status of DNSKEYs in a zone
  secure             initializes DNSSEC for a zone
  roll_zsk_stage1    perform the 1st stage rollover of zone's ZSK
  roll_zsk_stage2    perform the 2nd stage rollover of zone's ZSK 
  roll_ksk_stage1    perform the 1st stage rollover of zone's KSK
  roll_ksk_stage2    perform the 2nd stage rollover of zone's KSK
  unsign             removes all DNSKEYs from a zone
  showconfig         display psz's configuration settings
  createdb           creates database tables for the first time
  shell              Runs interactive Python shell configured for psz
  listkeys           Displays all keyfiles for active keys