$ dpkg -i openfire_3.4.4_all.deb
(Reading database ... 168713 files and directories currently installed.)
Preparing to replace openfire 3.4.4 (using .../toff/openfire_3.4.4_all.deb) ...
Unpacking replacement openfire ...
Setting up openfire (3.4.4) ...
chown: `openfire:openfire': invalid group
dpkg: error processing openfire (--install):
subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
openfire