Nov 9, 2023: the PyNUT module provided in NUT sources is now published as PyNUTClient by CI to https://pypi.org/project/PyNUTClient (release snapshots) and https://test.pypi.org/project/PyNUTClient/ (rolling master-branch revisions). Hopefully, pip would have easier time finding it now to help create NUT clients.

January 7, 2026 - Meet NUT Server, or Network UPS Tools.It’s an open UPS networking monitoring tool that runs on many different operating systems and processors.This means you can run the server on Linux, MacOS, or BSD and run the client on Windows, MacOS, ...

May 15, 2026 - Network UPS Tools (NUT) is a client/server monitoring system that allows computers to share uninterruptible power supply (UPS) and power distribution unit (PDU) hardware. Clients access the hardware through the server, and are notified whenever the power status changes.

November 4, 2021 - Done The following additional packages will be installed: bash-completion libupsclient4 Suggested packages: nut-monitor The following NEW packages will be installed: bash-completion libupsclient4 nut-client 0 upgraded, 3 newly installed, 0 to remove and 28 not upgraded. Need to get 673 kB of archives. After this operation, 2,348 kB of additional disk space will be used. Do you want to continue? [Y/n] ... root@linuxappserver [/var/log]# upsc tripplite@vmserver ups.status Init SSL without certificate database OL

The idea is that if you have multiple systems connected to the UPS, one can communicate the status of the UPS over the network and the others can monitor that status by running their own upsmon services. NUT has extensive documentation on the configuration however this is going to walk through a simple setup of a USB UPS and the associated server and monitor all in one system (common desktop configuration).

In the configuration file, you need to specify the connection details to the NUT server. If the NUT server is running on the same machine (localhost), you can use the following configuration: [client] server = 127.0.0.1 port = 3493 login = username password = password

This package provides NUT's clients that allows the user to control and monitor the UPS.

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Clients access the hardware through the server, and are notified whenever the power status changes. This package provides NUT's clients that allows the user to control and monitor the UPS.

May 11, 2026 - Since the hypervisor manager environment lacks access to hardware ports, this package only includes the upsmon client integration, and a NUT server must run in a VM with passed-through ports.

February 24, 2025 - When I did this last command, I unintentionally triggered a bug with the current version of nut-client on Debian 12... if a UPS self-test is run, the 'CAL' flag is set (calibration), and while it's set, any critical UPS battery alerts are ignored!

Network UPS Tools (NUT) is a client/server monitoring system that allows computers to share uninterruptible power supply (UPS) and power distribution unit (PDU) hardware. Clients access the hardware through the server, and are notified whenever the power status changes.

Original How-To URL: https://zackreed.me/installing-nut-on-ubuntu/ Install Nut apt-get install nut...

February 4, 2025 - WinNUT-Client is a NUT windows client for monitoring your ups hooked up to your favorite linux server.

October 17, 2025 - If you want reloads to work, upsmon must run as some user that has permissions to read the configuration file. We recommend making a new user just for this purpose, as making the file readable by "nobody" (the default user) would be a bad idea; packages typically ship with a nut or ups user to run NUT daemon services.

For this example, we’ll have a UPS called "sparky" that uses the apcsmart driver and is connected to /dev/ttyS1. That’s the second serial port on most Linux-based systems. The entry in ups.conf looks like this: ... To start and stop drivers, use upsdrvctl of upsdrvsvcctl (installed on operating systems with a service management framework supported by NUT).

June 13, 2022 - Done The following additional packages will be installed: bash-completion libupsclient4 Suggested packages: nut-monitor The following NEW packages will be installed: bash-completion libupsclient4 nut-client 0 upgraded, 3 newly installed, 0 to remove and 28 not upgraded. Need to get 673 kB of archives. After this operation, 2,348 kB of additional disk space will be used. Do you want to continue? [Y/n] ... root@linuxappserver [/var/log]# upsc tripplite@vmserver ups.status Init SSL without certificate database OL

February 4, 2025 - WinNUT-Client V2 is a replacement for older WinNUT Client (v1.x) which can use its configuration files. It allows a Windows client to monitor UPS state from a NUT data server running elsewhere (Linux servers, NAS appliances, etc.) and initiate safe shutdowns.

May 11, 2024 - We need to setup NUT to run in standalone mode. ... You should have a working UPS Monitoring system now. Next time, I’ll show you how to connect to this with other machines to enable safely shutting them down as well. Setting up a Client (Slave) Computer The nice thing about NUT is that it can control more than just the machine it’s hooked up to.

March 2, 2026 - Clients on remote machines can monitor the same UPS and shut down in sequence based on priority. # Install NUT sudo apt update sudo apt install -y nut nut-client # Check installed version upsd --version # Install USB HID UPS support (most modern UPS devices) sudo apt install -y nut-server # For SNMP-connected UPS devices sudo apt install -y nut-snmp