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Installing NUT (Network UPS Tools) on Ubuntu 18.04 LTS

Original How-To URL:

Install Nut

apt-get install nut

Edit /etc/nut/ups.conf

vi /etc/nut/ups.conf

Paste the foollowing at the bottom. Mine’s an APC-1500, so I’ve set it to a recognizable name (apc-1500)

driver = usbhid-ups
port = auto

Create the following directories and reboot machine

mkdir /var/run/nut
chown root:nut /var/run/nut
chmod 770 /var/run/nut

Start NUT

upsdrvctl start

Should give the following output

Network UPS Tools - UPS driver controller 2.4.3
Network UPS Tools - Generic HID driver 0.34 (2.4.3)
USB communication driver 0.31
Using subdriver: APC HID 0.95

Setup NUT to listen on Port 3493

vi /etc/nut/upsd.conf

Add the following lines where <IPADDRESS> is the IP of your machine

LISTEN ::1 3493

Set the mode

Edit /etc/nut/nut.conf:

vi /etc/nut/nut.conf

Enter the following:


Start the network data server


Check the status

upsc apc-1500@localhost ups.status

Should output the following


OL means your system is running On Line power. If you want to see all the info, try this instead

upsc apc-1500@localhost

Should output the following


battery.charge: 100

battery.charge.low: 10

battery.charge.warning: 50 2054/00/39 2008/10/20


Disable the beeper if needed

upscmd apc beeper.disable

Setup users to access the info and make changes.

vi /etc/nut/upsd.users

Add monitor master user and a monitor slave user for remote machines


        password = PASSWORD_REPLACE

        actions = SET FSD

        instcmds = ALL

        upsmon master

        # or upsmon slave


        password = slave

        upsmon slave

Reload upsd

upsd -c reload

Setup upsmon for our machine

vi /etc/nut/upsmon.conf

Paste the following

MONITOR apc-1500@localhost 1 local_mon PASSWORD_REPLACE master

Setup Nut in standalone mode

vi /etc/nut/nut.conf

Paste the following


Start NUT

service nut start

Setting up a Client (Slave) Computer

Install NUT

apt-get install nut

Edit /etc/nut/nut.conf

vi /etc/nut/nut.conf

Paste the following


Set your upsmon.conf to match the setup for your monuserslave above and the ip address of your master nut-server

vi /etc/nut/upsmon.conf

Paste the following where <IPADDRESS> is the ip of your NUT Server and <PASSWORD> is the password of your monuserslave password from above

MONITOR apc-1500@<IPADDRESS> 1 monuserslave <PASSWORD> slave

Restart your nut-client

service nut-client restart

Test with the following command where <IPADDRESS> is the IP of your NUT server

upsc apc-1500@<IPADDRESS>

Should output the following

Init SSL without certificate database

battery.charge: 100

battery.charge.low: 10

battery.charge.warning: 50 2054/00/39 2008/10/20

battery.runtime: 156

battery.runtime.low: 360

battery.type: PbAc

battery.voltage: 26.7

battery.voltage.nominal: 24.0

device.mfr: American Power Conversion

device.model: Back-UPS RS 1500 LCD

device.serial: 8B0843R44379

device.type: ups usbhid-ups

driver.parameter.pollfreq: 30

driver.parameter.pollinterval: 2

driver.parameter.port: auto

driver.version: 2.6.4 APC HID 0.95

driver.version.internal: 0.37

input.sensitivity: medium

input.transfer.high: 139

input.transfer.low: 88

input.voltage: 122.0

input.voltage.nominal: 120

ups.beeper.status: disabled

ups.delay.shutdown: 20

ups.firmware: 839.H7 .D

ups.firmware.aux: H7

ups.load: 29

ups.mfr: American Power Conversion 2008/10/20

ups.model: Back-UPS RS 1500 LCD

ups.productid: 0002

ups.realpower.nominal: 865

ups.serial: 8B0843R44379

ups.status: OL LB

ups.test.result: No test initiated

ups.timer.reboot: 0

ups.timer.shutdown: -1

ups.vendorid: 051d