linux查看是实体机还是虚拟机

1、判断虚拟机三种方式

1、dmesg|grep -i hypervisor

[root@localhost ~]# dmesg|grep -i hypervisor
[    0.000000] Hypervisor detected: VMware

2、lscpu 查看Hypervisor vendor:超管理器厂商

[root@k8s-master ~]# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    1
Core(s) per socket:    2
Socket(s):             4
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 79
Model name:            Intel(R) Xeon(R) CPU E5-4610 v4 @ 1.80GHz
Stepping:              1
CPU MHz:               1795.841
BogoMIPS:              3591.68
Hypervisor vendor:     VMware  #虚拟机
Virtualization type:   full
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              25600K
NUMA node0 CPU(s):     0-7

Hypervisor vendor: KVM #虚拟机

Virtualization: VT-x #实体机

KVM：

　　虚拟化技术有两种类型的实现：

　　Type-I : hypervisor------>VM

　　Type-II：host------>VM----->VMS

3、systemd-detect-virt

#虚拟机
[root@localhost ~]# systemd-detect-virt
vmware  
#实体机
[root@master242 ~]# systemd-detect-virt
none