Nut
From DWIKI
What is nut and where do I get it?
./configure --prefix=/usr/local --sysconfdir=/etc/ups --with-user=ups make make install make install-conf groupadd ups useradd -g ups ups chown ups.ups /dev/ttyS0 chmod 0600 /dev/ttyS0 mkdir /var/state/ups chmod 0700 /var/state/ups chown ups.ups /var/state/ups
first ups.conf
upsdrvctl start upsd -u ups & upsmon -u ups