---
name: "autopkgtest-virt-null"
section: "1"
platform: "linux"
package: "autopkgtest"
version: "5.49"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/autopkgtest-virt-null"
---

# autopkgtest-virt-null(1)

autopkgtest null virtualisation server

## NAME

autopkgtest-virt-null - autopkgtest null virtualisation server

## SYNOPSIS

**autopkgtest** *\[...\]* **-- null** \[*options*\]\

## DESCRIPTION

**autopkgtest-virt-null** provides a dummy autopkgtest virtualisation server which does not actually offer any kind of separation between host and testbed.

Normally **autopkgtest-virt-null** will be invoked by **autopkgtest**.

There is of course no locking; nothing prevents multiple simultaneous programs from invoking **autopkgtest-virt-null** so as to reuse the same system as a testbed.

## OPTIONS

- **-d** \| **--debug**

  Enables debugging output.  Probably not hugely interesting.

- **--fake-capability** *CAPABILITY*

  Advertise *CAPABILITY* in the list of capabilities, regardless of whether the capability is implemented. Note that this is hazardous - tests may malfunction, or even mess up the system.

  In autopkgtest 5.47 and earlier, autopkgtest-virt-null falsely advertises **isolation-machine**. This option can be used to restore that behaviour: **--fake-capability=isolation-machine**.

- **--retain-tmp**

  Do not delete the temporary directory on exit. When using this option you should probably set **TMPDIR** since that's where the directory is created.

## INPUT, OUTPUT AND EXIT STATUS

The behaviour of **autopkgtest-virt-null** is as described by the AutomatedTesting virtualisation regime specification.

## SEE ALSO

[**autopkgtest**(1)](/autopkgtest/1.md), **/usr/share/doc/autopkgtest/**.

## AUTHORS AND COPYRIGHT

This manpage is part of autopkgtest, a tool for testing Debian binary packages.  autopkgtest is Copyright (C) 2006-2007 Canonical Ltd and others.

See **/usr/share/doc/autopkgtest/CREDITS** for the list of contributors and full copying conditions.