Check whether Linux is a virtual machine or a physical machine

The first way: dmesg command

[root@test ~]# dmesg | grep -i hypervisor
[    0.000000] Hypervisor detected: VMware
[    0.001000] TSC freq read from hypervisor : 2903.999 MHz
[    6.311621] [drm] Max dedicated hypervisor surface memory is 0 kiB

Second way: lscpu command

If lscpuit appears in the command output Hypervisor vendor: KVM, it means it is a virtual machine, and if it appears Virtualization: VT-x, it means it is a physical machine.

[root@test ~]# lscpu | grep Hypervisor
[root@test ~]# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                4
On-line CPU(s) list:   0-3
Thread(s) per core:    1
Core(s) per socket:    2
座：                 2
NUMA 节点：         1
厂商 ID：           GenuineIntel
CPU 系列：          6
型号：              165
型号名称：        Intel(R) Core(TM) i7-10700 CPU @ 2.90GHz
步进：              5
CPU MHz：             2903.999
BogoMIPS：            5807.99
超管理器厂商：  VMware
虚拟化类型：     完全
L1d 缓存：          32K
L1i 缓存：          32K
L2 缓存：           256K
L3 缓存：           16384K
NUMA 节点0 CPU：    0-3

There are two types of implementations of virtualization technology:

• Type-I : hypervisor -> VM
• Type-II：host -> VM -> VMS

The third way: systemd-detect-virt command

[root@test ~]# systemd-detect-virt
vmware

The fourth way: dmidecode command

[root@test ~]# dmidecode -t 1
# dmidecode 2.12
SMBIOS 2.7 present.

Handle 0x0001, DMI type 1, 27 bytes
System Information
        Manufacturer: VMware, Inc.
        Product Name: VMware Virtual Platform
        Version: None
        Serial Number: VMware-56 4d 2a a5 0b e5 cb 1c-04 3e 84 3e da c3 3c 4c
        UUID: A52A4D56-E50B-1CCB-043E-843EDAC33C4C
        Wake-up Type: Power Switch
        SKU Number: Not Specified
        Family: Not Specified

Common cloud host output results