Nut-Graph: visualize blackouts By Ted Roche on December 13, 2005 in LAMP, Linux, MySQL, OpenSource, Security, Technology And once you have NUT monitoring your UPS serving multiple servers, consider adding Nut-Graph to give you a visual display of incoming voltage, load and battery status. Requires NUT, mod_php, MySQL 4.1 and Perl and jpgraph. Very slick!