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Install solo2-cli with Homebrew, Nix

CLI to update and use Solo 2 security keys. Version 0.2.2 via Homebrew; verified 2026-07-24. Also installable with nix: nix profile install nixpkgs#solo2-cli.

Install commandSecurity notes

install

Additional install commands

macOS

Homebrewverified · 100%
brew install solo2-cli

local Homebrew formula metadata

Linux

Nixverified · 92%
nix profile install nixpkgs#solo2-cli

nixpkgs package indexes · pkgs/by-name/so/solo2-cli/package.nix · source: api.github.com

overview

Package summary

CLI to update and use Solo 2 security keys

Commands and aliases

  • solo2

history

Project history and usage

solo2-cli is the Rust command-line utility and library package for SoloKeys Solo 2 security keys, aimed at firmware updates, device-mode management, and developer-oriented administration.

Project history

The official README describes the package as a Solo 2 library and CLI, while noting that the CLI is now maintained in the broader Solo 2 monorepo. The Cargo metadata names the published crate `solo2`, with a `solo2` binary and documentation on docs.rs.

The README reflects the hardware-oriented nature of the project: Solo 2 devices have regular and maintenance modes, Linux maintenance mode needs udev rules, and the CLI can switch between modes with commands such as `solo2 app admin maintenance` and `solo2 bootloader reboot`.

Adoption history

The official SoloKeys guide positions solo2-cli as the technical-user and developer tool for managing Solo 2, while basic FIDO2 use does not require software installation. The supplied package-manager facts list Homebrew and Nix packages, which matters for users who want a packaged CLI instead of a direct Cargo install.

How it is used

The README documents `cargo install solo2`, optional experimental `dev-pki` support, verbose logging flags, device UUID reads, switching to maintenance mode, and bootloader reboot. The SoloKeys guide says the CLI can manage passkeys, update firmware, set PINs, and configure PIV and OpenPGP settings.

Why package nerds care

solo2-cli is interesting because it packages hardware lifecycle operations as a normal developer CLI. It touches USB identifiers, PCSC/CTAP access, udev rules, firmware update flows, Rust crates, and security-key administration in one small executable.

Timeline

  • 2021: The README notes Solo 2 support in the CCID driver from release 1.4.35 on July 25, 2021.
  • 2022: Official git tags include the 0.2.x line.
  • 2026: The SoloKeys guide presents solo2-cli as the command-line management option for Solo 2.

Related projects

  • The README points to the Solo 2 monorepo as the current maintenance home. It also references lpc55-host, PCSC/CTAP interfaces, CCID driver support, and udev rules.

Sources

  • Input package-manager facts: source_facts.package-manager
  • Official Cargo metadata: https://github.com/solokeys/solo2-cli/blob/main/Cargo.toml
  • Official README: https://github.com/solokeys/solo2-cli#readme
  • Official Solo 2 guide: https://solokeys.com/pages/solo-2-guide
  • docs.rs documentation: https://docs.rs/solo2/latest/solo2

security posture

Risk level: green

narrow executable package without higher-risk signals.

Risk classifier

green risk · low confidence · appliance

Why

  • narrow executable package without higher-risk signals

Signals

  • metadata:no-higher-risk-signals

Install behavior

  • No Homebrew bottle metadata was recorded.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

CommandKindExposureNote
solo2executableindexed executableDiscovered from the local executable index.

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-08-03
manager version0.2.2
manager updated2026-07-24
local dataunknown
upstreamnot available
latest detectednot detected
  • okNo freshness warnings were generated.

install metadata

Package metadata

Package keybrew:solo2-cli
Version0.2.2
Package managerHomebrew
Homepagehttps://solokeys.com/
Repositoryhttps://github.com/solokeys/solo2-cli
Last updated2026-07-24T10:42:48Z
Pulseupdated
Bottlenot recorded
Servicenone declared

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Nix95%

solo2-cli

nix profile install nixpkgs#solo2-cli
  • normalized package name match
  • Matched by: Solo2 Cli
nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/so/solo2-cli/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Used sources

  • Geiger risk classifier
  • cross-ecosystem install command graph
  • curated package history
  • external package-manager database matches
  • pkg.so package database
  • pkgdb category and tag curation