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)





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