Hermes Install Fails on Ubuntu 24.04: The Fix Order

Three open reports in the Hermes Agent issue tracker describe the same experience on Ubuntu: the official installer stops without an error message. Issue 88529, filed August 17, 2026, traced a fresh Ubuntu Server 24.04.4 failure to a missing system library, libatomic.so.1, and then to an installer that sits forever at a Chrome download. Issue 89343 reports the same pair independently, and issue 87460 adds a third silent exit on minimal Ubuntu images. This page turns those three reports plus the official installation page into an install order that works on the first pass.

Before the script: what the official page actually asks for

The official install is one line:

curl -fsSL https://hermes-agent.nousresearch.com/install.sh | bash

The page states the installer brings Python 3.11, Node.js v26, ripgrep and ffmpeg on its own, and asks you to have four things present first: git, curl, xz-utils, and build-essential. On a fresh server image those are one command:

sudo apt update && sudo apt upgrade -y
sudo apt install -y git curl xz-utils build-essential

What this means for you: most silent failures on minimal Ubuntu images begin here. A script that expects curl or a compiler and finds neither can die with exit code 127, the shell's code for a missing command, and that is precisely the shape of issue 87460's report: the managed Node 26 step fails with no output on a minimal image.

Failure one: the missing libatomic1

Issue 88529's reporter did everything by the book on Ubuntu Server 24.04.4, clean install, apt update and upgrade first, and the installer still stopped quietly. Running it a second time surfaced the real complaint: libatomic.so.1 was missing. The fix, confirmed in the report, is one package before the script:

sudo apt install -y libatomic1

What this means for you: libatomic1 ships by default with desktop Ubuntu and is absent from some server and minimal images. Installing it costs seconds and removes the first silent stop entirely. Issue 89343 names the same library in its title, so this is a pattern on 24.04, and the reports were still open at the end of August 2026.

Failure two: the endless Chrome download

Past the library, issue 88529 hit the second wall: the installer printed "Downloading Chrome for Testing 145.0.7632.2 playwright chromium v1208" and sat there, in the reporter's words, waiting forever. This step fetches a full browser build for the agent's browser automation, hundreds of megabytes, so the honest first check is patience plus a look at the basics while it runs: df -h / for disk and a quick download test on the same box to rule out a stalled network.

What this means for you: a genuinely frozen download, minutes with zero disk growth under the installer's directory, matches the pattern in the open reports, and your own setup is off the hook. Both issues covering it were open and unresolved at the end of August 2026, so rerunning the installer after the libatomic1 fix, on a box with disk and network confirmed healthy, is the state of the art. If it still parks forever, add your details to issue 88529, because that is exactly the evidence the maintainers asked for.

The clean-install order that avoids all three

1. Update the base: sudo apt update && sudo apt upgrade -y
2. Install the official prerequisites plus the missing library: sudo apt install -y git curl xz-utils build-essential libatomic1
3. Run the official installer: curl -fsSL https://hermes-agent.nousresearch.com/install.sh | bash and give the Chrome step real time on a slow line.
4. Reload the shell: source ~/.bashrc, the official page's own fix for hermes: command not found.
5. Let Hermes check itself: hermes doctor, the diagnostics command the installation page recommends.

An installer that needs a second try is a fact of life on fresh images. A server where someone already fought these battles is the alternative: our managed Hermes Agent hosting hands you a working agent on a dedicated EU server in under ten minutes, measured on our own fleet, with a 7-day free trial and no card.

Sources: Hermes Agent issues 88529, 89343 and 87460, all open as of August 29, 2026, and the official Hermes Agent installation page, read the same day.