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判断Linux是否运行在物理机

dmidecode命令

dmidecode命令用来查看硬件信息。

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dmidecode is a tool for dumping a computer DMI (some say SMBIOS) table contents in a human-readable format. So if your machine is a vm, you should not get any output.

DMI ,即Desktop Management Interface。也有被称为SMBIOS,即System Management BIOS。

较低版本的dmidecode命令不支持参数,因此要看信息的话,要用more/less/grep来配合才能更好些。

  • 查看服务器型号:dmidecode | grep ‘Product Name’
  • 查看主板的序列号:dmidecode |grep ‘Serial Number’
  • 查看系统序列号:dmidecode -s system-serial-number
  • 查看内存信息:dmidecode -t memory
  • 查看OEM信息:dmidecode -t 11

显示生产厂商

物理机

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# dmidecode -s system-manufacturer
IBM

虚拟机

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# dmidecode -s system-manufacturer
OpenStack Foundation

显示产品名

物理机

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# dmidecode -s system-product-name
System x3650 M4 -[7915IA5]-

虚拟机

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# dmidecode -s system-product-name
OpenStack Nova

/proc/scsi/scsi文件

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Try check on /proc/scsi/scsi, if it is a vm, you would not get any attached device: 
Attached devices:

物理机

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# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 02 Id: 00 Lun: 00
Vendor: IBM Model: ServeRAID M5110e Rev: 3.15
Type: Direct-Access ANSI SCSI revision: 05

虚拟机

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# cat /proc/scsi/scsi
Attached devices:

ethtool命令

物理机

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# ethtool -i eth0
driver: igb
version: 3.2.10
firmware-version: 1.5-2
expansion-rom-version:
bus-info: 0000:06:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: no

虚拟机

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# ethtool -i eth0
driver: virtio_net
version: 1.0.0
firmware-version:
expansion-rom-version:
bus-info: 0000:00:03.0
supports-statistics: no
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no

此处简单介绍一下lspci命令。

lspci

lspci 是一个用来显示系统中所有PCI总线设备或连接到该总线上的所有设备的工具。

  1. lspci 不加任何选项

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    Host bridge:                      <==主板芯片
    VGA compatible controller <==显卡
    Audio device <==音频设备
    PCI bridge <==接口插槽
    USB Controller <==USB控制器
    ISA bridge
    IDE interface
    SMBus
    Ethernet controller <==网卡
  2. lspci -tv 列出所有的pci设备

  3. lspci | grep -i 'eth' 查看网卡型号

lscpi 和 eth*的对应关系

  1. /sys/devices设备信息

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    # pwd
    /sys/devices
    # find . -name '*eth*'
    ./pci0000:00/0000:00:1c.0/0000:06:00.0/net:eth0
    ./pci0000:00/0000:00:1c.0/0000:06:00.1/net:eth1
    ./pci0000:00/0000:00:1c.0/0000:06:00.2/net:eth2
    ./pci0000:00/0000:00:1c.0/0000:06:00.3/net:eth3
    # lspci -s 06:00.0
    06:00.0 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01)
  2. ethtool 方式

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    # ethtool -i eth1 
    driver: igb
    version: 3.2.10
    firmware-version: 1.5-2
    expansion-rom-version:
    bus-info: 0000:06:00.1
    supports-statistics: yes
    supports-test: yes
    supports-eeprom-access: yes
    supports-register-dump: yes
    supports-priv-flags: no
    # lspci -s 06:00.1 // bus-info
    06:00.1 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01)

优秀资料

怎么判断你的linux系统是不是运行在虚拟机器上面

linux下eth*与lspci中对应关系