systemd-detect-virt(1)
NAME
systemd-detect-virt - Detect execution in a virtualized environment
SYNOPSIS
systemd-detect-virt [OPTIONS...]
DESCRIPTION
systemd-detect-virt detects execution in a virtualized environment. It
identifies the virtualization technology and can distinguish full
machine virtualization from container virtualization.
systemd-detect-virt exits with a return value of 0 (success) if a
virtualization technology is detected, and non-zero (error) otherwise.
By default, any type of virtualization is detected, and the options
--container and --vm can be used to limit what types of virtualization
are detected.
When executed without --quiet will print a short identifier for the
detected virtualization technology. The following technologies are
currently identified:
Table 1. Known virtualization technologies (both VM, i.e. full hardware
virtualization, and container, i.e. shared kernel virtualization)
Type ID Product
VM qemu QEMU software
virtualization
kvm Linux KVM kernel
virtual machine
zvm s390 z/VM
vmware VMware Workstation
or Server, and
related products
microsoft Hyper-V, also known
as Viridian or
Windows Server
Virtualization
oracle Oracle VM
VirtualBox
(historically
marketed by innotek
and Sun
Microsystems)
xen Xen hypervisor
(only domU, not
dom0)
bochs Bochs Emulator
uml User-mode Linux
parallels Parallels Desktop,
Parallels Server
bhyve bhyve, FreeBSD
hypervisor
Container openvz OpenVZ/Virtuozzo
lxc Linux container
implementation by
LXC
lxc-libvirt Linux container
implementation by
libvirt
systemd-nspawn systemd's minimal
container
implementation, see
systemd-nspawn(1)
docker Docker container
manager
rkt rkt app container
runtime
If multiple virtualization solutions are used, only the "innermost" is
detected and identified. That means if both machine and container
virtualization are used in conjunction, only the latter will be
identified (unless --vm is passed).
OPTIONS
The following options are understood:
-c, --container
Only detects container virtualization (i.e. shared kernel
virtualization).
-v, --vm
Only detects hardware virtualization).
-r, --chroot
Detect whether invoked in a chroot(2) environment. In this mode, no
output is written, but the return value indicates whether the
process was invoked in a chroot() environment or not.
--private-users
Detect whether invoked in a user namespace. In this mode, no output
is written, but the return value indicates whether the process was
invoked inside of a user namespace or not. See user_namespaces(7)
for more information.
-q, --quiet
Suppress output of the virtualization technology identifier.
-h, --help
Print a short help text and exit.
--version
Print a short version string and exit.
EXIT STATUS
If a virtualization technology is detected, 0 is returned, a non-zero
code otherwise.
SEE ALSO
systemd(1), systemd-nspawn(1), chroot(2), namespaces(7)
Free and Open Source Software