Release notes October 22, 2026 · Linux Client · Release Notes

Linux Agent Now Available for Ubuntu 26.04 LTS

The Watchman Monitoring Linux agent now installs on Ubuntu 26.04 LTS. Packages for both amd64 and arm64 are in our apt repository today, starting with Linux Agent 4.0.12, and every future release will be published for 26.04 alongside 22.04, 24.04 and Debian.

There is nothing new to learn: the install command on the Installers → Linux page in your dashboard detects the Ubuntu release on its own. If you tried it on a 26.04 machine before today and apt couldn't find the monitoringclient package, run the same command again and it will go through.

Upgrading an existing host to 26.04?

Ubuntu's release upgrader turns off third-party apt repositories, ours included, while it upgrades. Once the host is on 26.04, re-enable the Watchman Monitoring repository (Software & Updates → Other Software, or the entry in /etc/apt/sources.list.d/) so the agent keeps getting updates:

sudo apt-get update && sudo apt-get install --only-upgrade monitoringclient

Confirm the version with:

monitoringclient version

Let us know if you have any questions or feature requests! Ian, Garrett, and Allen

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