Linux工具｜运维工具dmidecode使用小妙招

[root@localhost ~]# uname -a
Linux xxx.xxx 3.10.0-1062.el7.x86_64 #1 SMP Wed Aug 7 18:08:02 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost ~]#

[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)
[root@localhost ~]#

[root@localhost ~]# dmidecode -V
3.2
[root@localhost ~]#

[root@localhost ~]# dmidecode --help
Usage: dmidecode [OPTIONS]
Options are:
 -d, --dev-mem FILE     Read memory from device FILE (default: /dev/mem)
 -h, --help             Display this help text and exit
 -q, --quiet            Less verbose output
 -s, --string KEYWORD   Only display the value of the given DMI string
 -t, --type TYPE        Only display the entries of given type
 -H, --handle HANDLE    Only display the entry of given handle
 -u, --dump             Do not decode the entries
     --dump-bin FILE    Dump the DMI data to a binary file
     --from-dump FILE   Read the DMI data from a binary file
     --no-sysfs         Do not attempt to read DMI data from sysfs files
     --oem-string N     Only display the value of the given OEM string
 -V, --version          Display the version and exit
[root@localhost ~]#

[root@localhost ~]# dmidecode
## 下面会输出所有的硬件信息
……此处省略千字
Handle 0x0269, DMI type 33, 31 bytes
64-bit Memory Error Information
	Type: OK
	Granularity: Unknown
	Operation: Unknown
	Vendor Syndrome: Unknown
	Memory Array Address: Unknown
	Device Address: Unknown
	Resolution: Unknown

Handle 0x026A, DMI type 126, 4 bytes
Inactive
……此处省略千字

[root@localhost ~]# dmidecode --type bios
……省略无关信息
Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
	Vendor: Phoenix Technologies LTD
	Version: 6.00
	Release Date: 02/27/2020
	Address: 0xEA480
	Runtime Size: 88960 bytes
	ROM Size: 64 kB
	Characteristics:
		ISA is supported
		PCI is supported
		PC Card (PCMCIA) is supported
		PNP is supported
		APM is supported
		BIOS is upgradeable
		BIOS shadowing is allowed
		ESCD support is available
		Boot from CD is supported
		Selectable boot is supported
		EDD is supported
		Print screen service is supported (int 5h)
		8042 keyboard services are supported (int 9h)
		Serial services are supported (int 14h)
		Printer services are supported (int 17h)
		CGA/mono video services are supported (int 10h)
		ACPI is supported
		Smart battery is supported
		BIOS boot specification is supported
		Function key-initiated network boot is supported
		Targeted content distribution is supported
	BIOS Revision: 4.6
	Firmware Revision: 0.0

[root@localhost ~]#

[root@localhost ~]# dmidecode --type system
……省略无关信息
Handle 0x0001, DMI type 1, 27 bytes
## 系统信息
System Information
	Manufacturer: VMware, Inc.
	Product Name: VMware Virtual Platform
	Version: None
	Serial Number: xxxx
	UUID: xxxx
	Wake-up Type: Power Switch
	SKU Number: Not Specified
	Family: Not Specified

Handle 0x01A1, DMI type 15, 29 bytes
## 系统事件日志信息
System Event Log
	Area Length: 16 bytes
	Header Start Offset: 0x0000
	Header Length: 16 bytes
	Data Start Offset: 0x0010
	Access Method: General-purpose non-volatile data functions
	Access Address: 0x0000
	Status: Invalid, Full
	Change Token: 0x00000036
	Header Format: Type 1
	Supported Log Type Descriptors: 3
	Descriptor 1: POST error
	Data Format 1: POST results bitmap
	Descriptor 2: Single-bit ECC memory error
	Data Format 2: Multiple-event
	Descriptor 3: Multi-bit ECC memory error
	Data Format 3: Multiple-event

Handle 0x0265, DMI type 23, 13 bytes
## 系统重置信息
System Reset
	Status: Enabled
	Watchdog Timer: Present
	Boot Option: Do Not Reboot
	Boot Option On Limit: Do Not Reboot
	Reset Count: Unknown
	Reset Limit: Unknown
	Timer Interval: Unknown
	Timeout: Unknown

Handle 0x0268, DMI type 32, 20 bytes
## 系统Boot信息
System Boot Information
	Status: No errors detected

[root@localhost ~]#

[root@localhost ~]# dmidecode --type baseboard
……省略无关信息
Handle 0x0002, DMI type 2, 15 bytes
## 主板基础信息
Base Board Information
	Manufacturer: Intel Corporation
	Product Name: XXXX
	Version: None
	Serial Number: None
	Asset Tag: Not Specified
	Features: None
	Location In Chassis: Not Specified
	Chassis Handle: 0x0000
	Type: Unknown
	Contained Object Handles: 0

Handle 0x019F, DMI type 10, 8 bytes
## 主板设备1
On Board Device 1 Information
	Type: Video
	Status: Disabled
	Description: VMware SVGA II
## 主板设备2
On Board Device 2 Information
	Type: Sound
	Status: Disabled
	Description: XXX

[root@localhost ~]#

[root@localhost ~]# dmidecode --type processor | more
……省略无关信息
Handle 0x0004, DMI type 4, 42 bytes
## 处理器信息
Processor Information
  ## CPU插槽指定序列号
	Socket Designation: CPU #000
	Type: Central Processor
	Family: Unknown
  ## 处理器的制造商名称
	Manufacturer: GenuineIntel
	ID: XXXXX
  ## 处理器的版本号或修订号
	Version: Intel(R) Xeon(R) CPU E5-2696 v4 @ 2.20GHz
  ## 电压
	Voltage: 3.3 V
	External Clock: Unknown
  ## 处理器的最大时钟速度（以MHz或GHz为单位）
	Max Speed: 30000 MHz
  ## 处理器当前时钟速度
	Current Speed: 2200 MHz
	Status: Populated, Enabled
	Upgrade: ZIF Socket
	L1 Cache Handle: 0x0094
	L2 Cache Handle: 0x0114
	L3 Cache Handle: Not Provided
	Serial Number: Not Specified
	Asset Tag: Not Specified
	Part Number: Not Specified
  ## 核心数
	Core Count: 2
  ## 开启核心
	Core Enabled: 2
  ## 处理器特性
	Characteristics:
    ## 64位能力
		64-bit capable
    ## 多核
		Multi-Core
		Execute Protection

Handle 0x0004, DMI type 4, 42 bytes
Processor Information
	Socket Designation: CPU #001
	Type: Central Processor
--More--

[root@localhost ~]# dmidecode --type memory | more
……省略无关信息
Handle 0x0084, DMI type 5, 46 bytes
## 内存控制信息
Memory Controller Information
	Error Detecting Method: None
	Error Correcting Capabilities:
		None
	Supported Interleave: One-way Interleave
	Current Interleave: One-way Interleave
  ## 内存模块大小、内存总大小
	Maximum Memory Module Size: 32768 MB
	Maximum Total Memory Size: 491520 MB
	Supported Speeds:
		70 ns
		60 ns
  ## 支持内存类型
	Supported Memory Types:
		FPM
		EDO
		DIMM
		SDRAM
	## 内存插槽数量信息
	Associated Memory Slots: 15
		……省略无关信息
	Enabled Error Correcting Capabilities:
		None

Handle 0x0085, DMI type 6, 12 bytes
## 内存模块信息
Memory Module Information
	Socket Designation: RAM socket #0
	Bank Connections: None
	Current Speed: Unknown
	Type: EDO DIMM
	Installed Size: 8192 MB (Single-bank Connection)
	Enabled Size: 8192 MB (Single-bank Connection)
	Error Status: OK

Handle 0x0086, DMI type 6, 12 bytes
Memory Module Information
	Socket Designation: RAM socket #1
	Bank Connections: None
--More--

[root@localhost ~]# dmidecode | grep "Core Count" |  sort -u
	Core Count: 2
[root@localhost ~]#
[root@localhost ~]# lscpu | grep "Core"
Core(s) per socket:    2
[root@localhost ~]#
[root@localhost ~]# cat /proc/cpuinfo | grep "cpu cores"
cpu cores	: 2
cpu cores	: 2
cpu cores	: 2
cpu cores	: 2
[root@localhost ~]#