Provided by: nut_2.2.2-6ubuntu1_i386
ups.conf - UPS definitions for Network UPS Tools
This file is read by the driver controller upsdrvctl, the UPS drivers
that use the common core (see nutupsdrv(8)) and upsd(8). The file
begins with global directives, and then each UPS has a section which
contains a number of directives that set parameters for that UPS.
A UPS section begins with the name of the ups in brackets, and
continues until the next UPS name in brackets or until EOF. The name
"default" is used internally in upsd, so you can’t use it in this file.
You must define the "driver" and "port" elements for each entry.
Anything after that in a section is optional. A simple example might
look like this:
driver = megatec
port = /dev/ttyS0
desc = "Web server UPS"
A slightly more complicated version includes some extras for the
hardware‐specific part of the driver:
driver = apcsmart
port = /dev/cua00
cable = 940-0095B
sdtype = 2
desc = "Database server UPS"
In this case, the apcsmart(8) driver will receive variables called
"cable" and "sdtype" which have special meanings. See the man pages of
your driver(s) to learn which variables are supported and what they do.
chroot Optional. The driver will chroot(2) to this directory during
initialization. This can be useful when securing systems.
Optional. Path name of the directory in which the UPS driver
executables reside. If you don’t specify this, the programs
look in a built‐in default directory, which is often
Optional. Same as the UPS field of the same name, but this is
the default for UPSes that don’t have the field.
Optional. The status of the UPS will be refreshed after a
maximum delay which is controlled by this setting. This is
normally 2 seconds. This may be useful if the driver is
creating too much of a load on your system or network.
user Optional. If started as root, the driver will setuid(2) to the
user id associated with username.
driver Required. This specifies which program will be monitoring this
UPS. You need to specify the one that is compatible with your
hardware. See nutupsdrv(8) for more information on drivers in
general and pointers to the man pages of specific drivers.
port Required. This is the serial port where the UPS is connected.
On a Linux system, the first serial port usually is /dev/ttyS0.
On FreeBSD and similar systems, it probably will be /dev/cuaa0.
Optional. When you have multiple UPSes on your system, you
usually need to turn them off in a certain order. upsdrvctl
shuts down all the 0s, then the 1s, 2s, and so on. To exclude a
UPS from the shutdown sequence, set this to -1.
The default value for this parameter is 0.
desc Optional. This allows you to set a brief description that upsd
will provide to clients that ask for a list of connected
nolock Optional. When you specify this, the driver skips the port
locking routines every time it starts. This may allow other
processes to seize the port if you start more than one
You should only use this if your system won’t work without it.
This may be needed on Mac OS X systems.
Optional. This can be set as a global variable above your first
UPS definition and it can also be set in a UPS section. This
value controls how long upsdrvctl will wait for the driver to
finish starting. This keeps your system from getting stuck due
to a broken driver or UPS.
The default is 45 seconds.
All other fields are passed through to the hardware‐specific part of
the driver. See those manuals for the list of what is allowed.
upsdrvctl(8) uses this file to start and stop the drivers.
The drivers themselves also obtain configuration data from this file.
Each driver looks up its section and uses that to configure itself.
upsd(8) learns about which UPSes are installed on this system by
reading this file. If this system is called "doghouse" and you have
defined a UPS in your ups.conf called "snoopy", then you can monitor it
from upsc(8) or similar as "snoopy@doghouse".
upsd(8), nutupsdrv(8), upsdrvctl(8)
The NUT (Network UPS Tools) home page: http://www.networkupstools.org/
Sun Aug 24 2003 UPS.CONF(5)