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How to spin up a disposable Linux sandbox for an agent with Cua

Install the Cua CLI and create, use, screenshot and remove a gVisor container in four commands.

Short answer: Install with curl -fsSL https://cua.ai/install.sh | sh (Windows uses the PowerShell installer); then create a sandbox: cua sb create ubuntu --name dev; run a command inside: cua sb exec dev uname -a. All steps.

Remote script. The installer pipes a script from Cua.ai into your shell and runs Cua auth login; read it first if you prefer.

Who it is forA developer who wants agents to run commands somewhere other than their own machine.

The problemLetting an agent run shell commands on your laptop risks your files and setup.

The outcomeA disposable sandbox you can exec into, screenshot and delete, from the CLI or Python.

What you need first

  • macOS 26 or later for Cua Spaces
  • Apple Silicon for Lume VMs
  • macOS, Linux or Windows for the cua CLI and Cua Driver
  • Spaces is free for individuals; Pro and Teams are paid

Steps

  1. Install with curl -fsSL https://cua.ai/install.sh | sh (Windows uses the PowerShell installer)
  2. Create a sandbox: cua sb create ubuntu --name dev
  3. Run a command inside: cua sb exec dev uname -a
  4. Take a screenshot with cua sb screenshot dev
  5. Remove it when done with cua sb rm dev

Prompt for your agent

Using trycua/cua, create a sandbox named dev, run <commands> inside it with cua sb exec, capture a screenshot, return the outputs to me, and then remove the sandbox.

Caveat.

Use this in your AI agent

Ask your agent

Using the Deduped MCP, get the setup steps for trycua/cua and "Spin up a disposable Linux sandbox for an agent"

Add Deduped to Claude Code once

claude mcp add --transport http deduped https://dedupedai.com/mcp

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