agentOS: Run AI Agents in a Secure Linux Sandbox

The post agentOS: Run AI Agents in a Secure Linux Sandbox first appeared on Tecmint: Linux Howtos, Tutorials & Guides . I burned through half of my E2B sandbox budget in just two weeks by spinning up containers for AI agents The post agentOS: Run AI Agents in a Secure Linux Sandbox first appeared on Tecmint: Linux Howtos, Tutorials & Guides .

I had been integrating AI coding agents into a few automation scripts on TecMint’s backend. These agents would generate a draft, run a command, check the output, and repeat the process until the task was complete. Since I didn’t want an AI agent running random shell commands directly on my production server, every task needed its own isolated environment.

Like many people, I started with Docker and later switched to a hosted sandbox service when Docker’s startup time became a bottleneck. Everything worked well at first, but eventually both the cost and the startup delay became hard to ignore. A sandbox that takes 400 to 900 milliseconds to start may not seem slow by itself.

However, when an AI agent creates a new sandbox for every task, retry, or small step, that delay quickly adds up. On top of that, I was paying for a full 1 GiB virtual machine even when it was only being used to run a simple two-line shell command. That’s when I came across agentOS, an open-

Source and reference

source project from the Rivet team. Before going further, it’s important to understand what agentOS actually is, because its name can be misleading. It is not a command-line tool that you install with a package manager and use like eza or bat . Instead, it is a Node.js library that lets you run an isolated Linux-like virtual machine directly inside your backend application. It includes WebAssembly-based versions of many familiar GNU utilities, such as coreutils , grep , sed , gawk , findutils , tar , gzip , and more. That difference is important, so I’ll walk through exactly how I set it up. What agentOS Actually Does agentOS is an in-process operating system kernel written in Rust and distributed as an npm package. When you call AgentOs.create() in your Node.js application, it creates a virtual Linux-like environment inside your existing process. This environment includes a virtual...

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