Install Topo

Install Topo on a host to deploy applications to an Arm-based Linux target. The host and target can be separate systems. You can also use one AArch64 Linux system as both the host and target.

Supported systems

Topo release binaries support the following host systems:

Host operating system	Host architecture
Linux	AMD64 and Arm64
macOS	Intel and Apple silicon
Windows	x64 and Arm64

A target must run Linux on AArch64 (linux/arm64). Topo uses Docker to build images on the host and run containers on the target.

Prepare the host

Install the following tools on the host:

• Docker
• curl
• OpenSSH client
• Git to clone Topo Projects from Git repositories

Topo also needs network access to download releases, clone projects, and pull container images. Network requirements vary by project because project builds can download additional dependencies.

Prepare the target

The target requires:

• Linux on AArch64 (linux/arm64)
• Docker configured so that the target user can run commands without sudo
• lscpu, which is usually included in the util-linux package
• A POSIX-compatible login shell like sh or bash
• SSH access from the host unless you deploy to localhost

Choose an installation method

Homebrew

Install from the Arm Homebrew tap:

brew install arm/topo/topo

You can use Homebrew on macOS and supported Linux distributions. See Homebrew for installation instructions.

Linux and macOS script

The installer supports AMD64 and Arm64 hosts. It requires tar and the install utility. By default, it installs topo in $HOME/.local/bin.

If your security policy requires source review, review the current installer script in the Topo repository before you run it.

curl -fsSL https://raw.githubusercontent.com/arm/topo/refs/heads/main/scripts/install.sh | sh

If $HOME/.local/bin is not on PATH, run the shell-specific command printed by the installer. Then open a new terminal.

Windows script

The installer requires PowerShell 5.1 or later. If your security policy requires source review, review the current installer script in the Topo repository before you run it.

irm https://raw.githubusercontent.com/arm/topo/refs/heads/main/scripts/install.ps1 | iex

The installer adds its default installation directory to your user PATH. Open a new terminal to make the updated PATH available to other applications.

Verify the installation

Print the installed version:

topo --version

Check the host dependencies:

topo health

Fix every host error before you continue. For some problems, the report provides a command that applies the fix.

Install a specific version or use a custom directory

The Linux and macOS installer supports --version and --path. To use these options, download the script before you run it:

curl -fsSL https://raw.githubusercontent.com/arm/topo/refs/heads/main/scripts/install.sh -o install-topo.sh
sh install-topo.sh --version v4.0.0 --path "$HOME/bin"
rm install-topo.sh

The Windows installer provides equivalent -Version and -Path parameters:

$installer = irm https://raw.githubusercontent.com/arm/topo/refs/heads/main/scripts/install.ps1
& ([scriptblock]::Create($installer)) -Version v4.0.0 -Path C:\tools\topo

Replace v4.0.0 with the required release version. If you use a custom directory, add it to PATH manually.

Upgrade Topo

Use the method that matches how you installed Topo.

Install script or direct binary

Upgrade to the latest release:

topo upgrade

To install a specific version, run the installer again with its version option.

Homebrew

Update Homebrew and upgrade Topo:

brew update
brew upgrade topo

Verify the upgrade:

topo --version
topo health

Uninstall Topo

Choose the instructions that match the installation method.

Linux and macOS script

Remove the binary from the default installation directory:

rm "$HOME/.local/bin/topo"

If you selected a custom directory, remove topo from that directory instead. Remove any PATH entry that you added only for Topo.

Homebrew

brew uninstall topo

Windows

Delete the default installation directory, %LOCALAPPDATA%\Programs\topo. If you selected a custom directory, delete topo.exe from that directory instead. Remove the installation directory from your user PATH.

Uninstalling Topo does not remove:

• Cloned project directories
• Containers or images on a target
• The topo-registry container on the host
• SSH keys or configuration entries created by topo setup-keys

Remove the local registry container if you no longer need it:

docker rm -f topo-registry

Other Topo installations or target aliases might use entries in ~/.ssh/config or ~/.ssh/topo_config, or keys named ~/.ssh/id_ed25519_topo_*. Remove only unused entries and keys.

Next steps

Follow Getting started to check a target and deploy an example project.