突然有一天，有人问，这台设备是物理机还是虚拟机，我就懵逼了。
很简单，这里写一下，以后查起来方便。
方法一：dmesg
举例如下：
###这是阿里云的云主机 [root@xxx ~]# dmesg |grep -i virtual [ 0.000000] Booting paravirtualized kernel on KVM [ 0.707486] KVM setup paravirtual spinlock [ 1.811087] input: VirtualPS/2 VMware VMMouse as /devices/platform/i8042/serio1/input/input2 [ 1.811257] input: VirtualPS/2 VMware VMMouse as /devices/platform/i8042/serio1/input/input3 [ 1.824106] systemd[1]: Detected virtualization kvm. [ 1.853583] systemd[1]: Starting Setup Virtual Console...
###这是一台物理机 [root@xxx]# dmesg |grep -i virtual Booting paravirtualized kernel on bare hardware input: Macintosh mouse button emulation as /devices/virtual/input/input1
方法二：dmidecode
举例如下：
###这是阿里云的云主机 [root@xxx~]# dmidecode -s system-product-name Alibaba Cloud ECS
###这是一台物理机 [root@xxx]# dmidecode -s system-product-name PowerEdge R720