Network UPS Tools User Manual
Network UPS Tools User Manual
Network UPS Tools User Manual
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<strong>Network</strong> <strong>UPS</strong> <strong>Tools</strong> <strong>User</strong> <strong>Manual</strong> 17 / 84<br />
Ownership and permissions<br />
Set ownership data and permissions on your serial or USB ports that go to your <strong>UPS</strong> hardware. Be sure to limit access to just the<br />
user you created earlier.<br />
These examples assume the second serial port (ttyS1) on a typical Slackware system. On FreeBSD, that would be cuaa1. Serial<br />
ports vary greatly, so yours may be called something else.<br />
chmod 0660 /dev/ttyS1<br />
chown root:nut /dev/ttyS1<br />
The setup for USB ports is slightly more complicated. Device files for USB devices, such as /proc/bus/usb/002/001, are usually<br />
created "on the fly" when a device is plugged in, and disappear when the device is disconnected. Moreover, the names of these<br />
device files can change randomly. To set up the correct permissions for the USB device, you may need to set up (operating system<br />
dependent) hotplugging scripts. Sample scripts and information are provided in the scripts/hotplug and scripts/udev directories.<br />
For most users, the hotplugging scripts will be installed automatically by "make install".<br />
(If you want to try if a driver works without setting up hotplugging, you can add the "-u root" option to upsd, upsmon, and drivers;<br />
this should allow you to follow the below instructions. However, don’t forget to set up the correct permissions later!).<br />
Note<br />
if you are using something like udev or devd, make sure these permissions stay set across a reboot. If they revert to the old<br />
values, your drivers may fail to start.<br />
You are now ready to configure NUT, and start testing and using it.<br />
You can jump directly to the NUT configuration.<br />
5.2 Installing from packages<br />
This chapter describes the specific installation steps when using binary packages that exist on various major systems.<br />
5.2.1 Debian, Ubuntu and other derivatives<br />
Note<br />
NUT is packaged and well maintained in these systems. The official Debian packager is part of the NUT Team.<br />
Using your prefered method (apt-get, aptitude, Synaptic, . . . ), install the nut package, and optionaly the following:<br />
• nut-cgi, if you need the CGI (HTML) option,<br />
• nut-snmp, if you need the snmp-ups driver,<br />
• nut-xml, for the netxml-ups driver,<br />
• nut-powerman-pdu, to control the PowerMan daemon (PDU management)<br />
• nut-dev, if you need the development files.<br />
Configuration files are located in /etc/nut. nut.conf(5) must be edited to be able to invoke /etc/init.d/nut<br />
Note<br />
Ubuntu users can access the APT URL installation by clicking on this link.
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