---
name: "vmt"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/vmt"
---

# vmt(4)

VMware Tools driver

## NAME

**vmt** – VMware Tools driver

## SYNOPSIS

**vmt0 at pvbus0**

## DESCRIPTION

The **vmt** driver is a kernel level implementation of VMware Tools. VMware Tools are intended to provide better support for operating systems running inside virtual machines.

**vmt** handles shutdown and reboot requests from the host by signalling [init(8)](/init/8.md) with SIGUSR2 and SIGINT respectively. **vmt** will log notifications that the guest has been suspended or resumed by the host. It also provides access to the host machine's clock as a timedelta sensor.

**vmt** reports the guest's hostname and all non-loopback IP addresses to the host.

## SEE ALSO

[pvbus(4)](/pvbus/4.md), [init(8)](/init/8.md), [sensorsd(8)](/sensorsd/8.md), [sysctl(8)](/sysctl/8.md)

A **vmwh** helper program is available via [packages(7)](/packages/7.md).

## HISTORY

The **vmt** driver first appeared in OpenBSD 4.4.

## AUTHORS

The **vmt** driver was written by David Gwynne ⟨*dlg@openbsd.org*⟩.