systemd-detect-virtsystemdsystemd-detect-virt1systemd-detect-virtDetect execution in a virtualized environmentsystemd-detect-virtOPTIONSDescriptionsystemd-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
and can be used
to limit what types of virtualization are detected.When executed without will print a
short identifier for the detected virtualization technology. The
following technologies are currently identified:
Known virtualization technologies (both
VM, i.e. full hardware virtualization,
and container, i.e. shared kernel virtualization)TypeIDProductVMqemuQEMU software virtualization, without KVMkvmLinux KVM kernel virtual machine, in combination with QEMU. Not used for other virtualizers using the KVM interfaces, such as Oracle VirtualBox or Amazon EC2 Nitro, see below.amazonAmazon EC2 Nitro using Linux KVMzvms390 z/VMvmwareVMware Workstation or Server, and related productsmicrosoftHyper-V, also known as Viridian or Windows Server VirtualizationoracleOracle VM VirtualBox (historically marketed by innotek and Sun Microsystems), for legacy and KVM hypervisorpowervmIBM PowerVM hypervisor — comes as firmware with some IBM POWER serversxenXen hypervisor (only domU, not dom0)bochsBochs EmulatorumlUser-mode LinuxparallelsParallels Desktop, Parallels Serverbhyvebhyve, FreeBSD hypervisorqnxQNX hypervisoracrnACRN hypervisorappleApple virtualization frameworksreLMHS SRE hypervisorgoogleGoogle Compute EngineContaineropenvzOpenVZ/VirtuozzolxcLinux container implementation by LXClxc-libvirtLinux container implementation by libvirtsystemd-nspawnsystemd's minimal container implementation, see systemd-nspawn1dockerDocker container managerpodmanPodman container managerrktrkt app container runtimewslWindows Subsystem for Linuxprootproot userspace chroot/bind mount emulationpouchPouch Container Engine
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
is passed). Windows Subsystem for Linux is not a Linux container,
but an environment for running Linux userspace applications on
top of the Windows kernel using a Linux-compatible interface.
WSL is categorized as a container for practical purposes.
Multiple WSL environments share the same kernel and services
should generally behave like when being run in a container.When executed with , instead of
printing the virtualization technology, it will display the
confidential virtual machine technology, if any. The
following technologies are currently identified:
OptionsThe following options are understood:Only detects container virtualization (i.e.
shared kernel virtualization).Only detects hardware virtualization.Detect whether invoked in a
chroot2
environment. In this mode, no output is written, but the return
value indicates whether the process was invoked in a
chroot()
environment or not.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_namespaces7
for more information.Detect whether invoked in a confidential virtual machine.
The result of this detection may be used to disable features that should
not be used in confidential VMs. It must not be used to release security
sensitive information. The latter must only be released after attestation
of the confidential environment.Suppress output of the virtualization
technology identifier.Output all currently known and detectable container and VM environments.Output all currently known and detectable confidential virtualization technologies.Exit statusIf a virtualization technology is detected, 0 is returned, a
non-zero code otherwise.See Alsosystemd1systemd-nspawn1chroot2namespaces7