Linux查看硬件信息命令
一、查看服务器硬件信息
（1）查看服务器型号、序列号
[root@Master ~]# dmidecode|grep "System Information" -A9|egrep "Manufacturer|Product|Serial"
序列号 dmidecode -s system-serial-number
（2）查看主板型号
[root@Master ~]# dmidecode |grep -A16 "System Information$" 
（3）查看BIOS信息
[root@Master ~]# dmidecode -t bios
# dmidecode 2.12
SMBIOS 2.8 present.
Handle 0x0008, DMI type 0, 24 bytes
BIOS Information
Vendor: HP
Version: U19
Release Date: 12/27/2015
Address: 0xF0000
Runtime Size: 64 kB
ROM Size: 16384 kB
Characteristics:
PCI is supported
PNP 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
5.25"/360 kB floppy services are supported (int 13h)
5.25"/1.2 MB floppy services are supported (int 13h)
3.5"/720 kB floppy services are supported (int 13h)
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
USB legacy is supported
BIOS boot specification is supported
Function key-initiated network boot is supported
Targeted content distribution is supported
UEFI is supported
BIOS Revision: 2.0
Firmware Revision: 2.40
（3）查看内存槽及内存条
[root@Master ~]# dmidecode -t memory | head -45 | tail -23
Memory Device
Array Handle: 0x000A
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 16384 MB
Form Factor: DIMM
Set: None
Locator: PROC 1 DIMM 1
Bank Locator: Not Specified
Type: DDR4
Type Detail: Synchronous Registered (Buffered)
Speed: 2133 MHz
Manufacturer: HP
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: 752369-081
Rank: 2
Configured Clock Speed: 2133 MHz
Minimum Voltage: 1.2 V
Maximum Voltage: 1.2 V
Configured Voltage: 1.2 V
[root@Master ~]#
（4）查看网卡信息
[root@Master ~]# dmesg | grep -i Ethernet
igb: Intel(R) Gigabit Ethernet Network Driver - version 5.3.0-k
igb 0000:04:00.0: Intel(R) Gigabit Ethernet Network Connection
igb 0000:04:00.1: Intel(R) Gigabit Ethernet Network Connection
igb 0000:04:00.2: Intel(R) Gigabit Ethernet Network Connection
igb 0000:04:00.3: Intel(R) Gigabit Ethernet Network Connection
igb 0000:02:00.0: Intel(R) Gigabit Ethernet Network Connection
igb 0000:02:00.1: Intel(R) Gigabit Ethernet Network Connection
（5） 查看pci信息，即主板所有硬件槽信息
[root@Master ~]# lspci | head -10
00:00.0 Host bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 DMI2 (rev 02)
00:01.0 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express Root Port 1 (rev 02)
00:01.1 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express Root Port 1 (rev 02)
00:02.0 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express Root Port 2 (rev 02)
00:02.1 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express Root Port 2 (rev 02)
00:02.2 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express Root Port 2 (rev 02)
00:02.3 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express Root Port 2 (rev 02)
00:03.0 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express Root Port 3 (rev 02)
00:03.1 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express Root Port 3 (rev 02)
00:03.2 PCI bridge: Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 PCI Express Root Port 3 (rev 02)
二、查看CPU信息
（1）查看cpu型号
[root@Master ~]# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c
40 Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
（2）查看系统中实际物理CPU的数量（物理）
[root@Master ~]# grep 'physical id' /proc/cpuinfo | sort | uniq | wc -l
2
（3）系统中实际物理CPU的数量（核数）
[root@Master ~]# cat /proc/cpuinfo |grep 'processor'|wc -l
40
（4）查看每个物理CPU中core的个数(即核数)
[root@Master ~]# cat /proc/cpuinfo |grep "cores"|uniq
cpu cores : 10
（5）查看CPU的主频
[root@Master ~]# cat /proc/cpuinfo |grep MHz|uniq
cpu MHz : 1200.000
cpu MHz : 2300.000
cpu MHz : 1200.000
（6）查看CPU的详细信息
[root@Master ~]# cat /proc/cpuinfo | head -20
processor : 0 //逻辑处理器的ID
vendor_id : GenuineIntel
cpu family : 6
model : 63
model name : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz //CPU型号
stepping : 2
microcode : 54
cpu MHz : 1200.000
cache size : 25600 KB
physical id : 0
siblings : 20 //相同物理封装处理器中逻辑处理器数
core id : 0
cpu cores : 10 //相同物理封装处理器中的内核数
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 15
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase bmi1 avx2 smep bmi2 erms invpcid cqm cqm_llc cqm_occup_llc
（7）查看CPU的相关信息
[root@Master ~]# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 40
On-line CPU(s) list: 0-39
Thread(s) per core: 2
Core(s) per socket: 10
Socket(s): 2
NUMA node(s): 2
Vendor ID: GenuineIntel
CPU family: 6
Model: 63
Model name: Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
Stepping: 2
CPU MHz: 1200.000
BogoMIPS: 4594.43
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 25600K
NUMA node0 CPU(s): 0-9,20-29
NUMA node1 CPU(s): 10-19,30-39
[root@Master ~]#
（8）查看cpu运行模式
[root@Master ~]# getconf LONG_BIT
64
（9）查看cpu是否支持64bit
[root@Master ~]# cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l
40
(结果大于0, 说明支持64bit计算. lm指long mode, 支持lm则是64bit)
三、查看内存信息
（1）查看内存硬件信息
root@Master ~]# dmidecode -t memory | head -45 | tail -24
Handle 0x000C, DMI type 17, 40 bytes
Memory Device
Array Handle: 0x000A
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 16384 MB
Form Factor: DIMM
Set: None
Locator: PROC 1 DIMM 1
Bank Locator: Not Specified
Type: DDR4
Type Detail: Synchronous Registered (Buffered)
Speed: 2133 MHz
Manufacturer: HP
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: 752369-081
Rank: 2
Configured Clock Speed: 2133 MHz
Minimum Voltage: 1.2 V
Maximum Voltage: 1.2 V
Configured Voltage: 1.2 V
（2）最大支持多少内存
[root@Master ~]# dmidecode|grep -P 'Maximum\s+Capacity'
（3）Linux 查看内存的插槽数,已经使用多少插槽.每条内存多大：
（4）Linux 查看内存的频率：
[root@Master ~]# dmidecode|grep -A16 "Memory Device"|grep 'Speed'
没插内存就是unknown
（5）Linux 查看内存的详细信息：
[root@Master ~]# cat /proc/meminfo |head -20
MemTotal: 131897620 kB
MemFree: 414124 kB
Buffers: 1040560 kB
Cached: 111083180 kB
SwapCached: 1320 kB
Active: 7637912 kB
Inactive: 110607108 kB
Active(anon): 4406900 kB
Inactive(anon): 1714900 kB
Active(file): 3231012 kB
Inactive(file): 108892208 kB
Unevictable: 10878976 kB
Mlocked: 5521652 kB
SwapTotal: 16777212 kB
SwapFree: 16737536 kB
Dirty: 180 kB
Writeback: 0 kB
AnonPages: 16999324 kB
Mapped: 149020 kB
Shmem: 172 kB
（6）Linux 查看内存的使用情况
[root@Master ~]# free -m // -b,-k,-m,-g show output in bytes, KB, MB, or GB
total used free shared buffers cached
Mem: 128806 123407 5398 0 1015 103474
-/+ buffers/cache: 18918 109888
Swap: 16383 38 16345
四、查看硬盘信息
（1）查看挂接的分区状态
[root@Master ~]# fdisk -l |grep Disk
（2）查看硬盘和分区分布
[root@Master ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 279.4G 0 disk
├─sda1 8:1 0 50M 0 part /boot
├─sda2 8:2 0 100G 0 part /
├─sda3 8:3 0 50G 0 part /home
├─sda4 8:4 0 1K 0 part
├─sda5 8:5 0 16G 0 part [SWAP]
├─sda6 8:6 0 13.3G 0 part /tmp
└─sda7 8:7 0 100G 0 part /usr
sdb 8:16 0 83.7T 0 disk
└─sdb1 8:17 0 83.7T 0 part /PureDisk
（3）查看硬盘和分区的详细信息
[root@Master ~]# fdisk -l
Disk /dev/sda: 300.0 GB, 299966445568 bytes
255 heads, 63 sectors/track, 36468 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 262144 bytes / 262144 bytes
Disk identifier: 0x000384d9
Device Boot Start End Blocks Id System
/dev/sda1 * 1 7 51200 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 7 13061 104857600 83 Linux
/dev/sda3 13061 19588 52428800 83 Linux
/dev/sda4 19588 36469 135597056 5 Extended
/dev/sda5 19588 21677 16777216 82 Linux swap / Solaris
/dev/sda6 21677 23415 13962240 83 Linux
/dev/sda7 23416 36469 104854528 83 Linux
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdb: 92017.3 GB, 92017310654464 bytes
255 heads, 63 sectors/track, 11187134 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 262144 bytes / 6029312 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdb1 1 267350 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
（4）查看挂接的分区状态
[root@Master ~]# mount | column -t
/dev/sda2 on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/sda1 on /boot type ext4 (rw)
/dev/sda3 on /home type ext4 (rw)
/dev/sda6 on /tmp type ext4 (rw)
/dev/sda7 on /usr type ext4 (rw)
/dev/sdb1 on /PureDisk type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw
（5）查看挂接的分区状态
[root@Master ~]# swapon -s
Filename Type Size Used Priority
/dev/sda5 partition 16777212 39676 -1
（6）查看硬盘使用情况
[root@Master ~]# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda2 ext4 99G 561M 93G 1% /
tmpfs tmpfs 63G 76K 63G 1% /dev/shm
/dev/sda1 ext4 45M 38M 4.9M 89% /boot
/dev/sda3 ext4 50G 52M 47G 1% /home
/dev/sda6 ext4 13G 34M 13G 1% /tmp
/dev/sda7 ext4 99G 21G 73G 23% /usr
/dev/sdb1 ext4 84T 41T 40T 51% /PureDisk
（7） 硬盘检测命令smartctl
[root@Master ~]# smartctl -a /dev/sda
smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-642.el6.x86_64] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net
Vendor: HP
Product: LOGICAL VOLUME
Revision: 3.56
User Capacity: 299,966,445,568 bytes [299 GB]
Logical block size: 512 bytes
Logical Unit id: 0x600508b1001cc8a1b9ec4dacc5ab35dc
Serial number: PDNNK0BRH9U0AG
Device type: disk
Local Time is: Mon Feb 5 13:13:33 2018 CST
Device supports SMART and is Enabled
Temperature Warning Disabled or Not Supported
SMART Health Status: OK
Error Counter logging not supported
Device does not support Self Test logging
五、查看网卡信息
（1)查看网卡硬件信息
[root@Master ~]# lspci | grep -i 'eth'
(2)查看系统的所有网络接口
[root@Master ~]# ifconfig -a
[root@Master ~]# ip link show
(3)查看某个网络接口的详细信息，例如eth0的详细参数和指标
[root@Master ~]# ethtool eth0
Settings for eth0:
Supported ports: [ FIBRE ]
Supported link modes: 10000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: No
Advertised link modes: 10000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: No
Speed: 10000Mb/s
Duplex: Full
Port: FIBRE
PHYAD: 0
Transceiver: external
Auto-negotiation: off
Supports Wake-on: d
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
(4)查看所有网卡的链路状态
[root@Master ~]# for i in `seq 0 9`;do ethtool eth${i} | egrep 'eth|Link';done
Settings for eth0:
Link detected: yes
Settings for eth1:
Link detected: yes
Settings for eth2:
Link detected: no
Settings for eth3:
Link detected: no
Settings for eth4:
Link detected: no
Settings for eth5:
Link detected: no
Settings for eth6:
Link detected: no
Settings for eth7:
Link detected: no
Settings for eth8:
Link detected: no
Settings for eth9:
Link detected: no
六、列出所有PCI设备信息
[root@Master ~]# lspci -tv | more
-+-[0000:ff]-+-08.0 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 QPI Link 0
| +-08.3 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 QPI Link 0
| +-09.0 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 QPI Link 1
| +-09.3 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 QPI Link 1
| +-0b.0 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 R3 QPI Link 0 & 1 Monitoring
| +-0b.1 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 R3 QPI Link 0 & 1 Monitoring
| +-0b.2 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 R3 QPI Link 0 & 1 Monitoring
| +-0c.0 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Unicast Registers
| +-0c.1 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Unicast Registers
| +-0c.2 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Unicast Registers
| +-0c.3 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Unicast Registers
| +-0c.4 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Unicast Registers
| +-0c.5 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Unicast Registers
| +-0c.6 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Unicast Registers
| +-0c.7 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Unicast Registers
| +-0d.0 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Unicast Registers
| +-0d.1 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Unicast Registers
| +-0f.0 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Buffered Ring Agent
| +-0f.1 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Buffered Ring Agent
| +-0f.2 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Buffered Ring Agent
| +-0f.3 Intel Corporation Xeon E7 v3/Xeon E5 v3/Core i7 Buffered Ring Agent
dmidecode
使用该命令可以查询BIOS、系统、主板、处理器、内存、缓存等非常重要信息。下面是其常用的几个命令:
# dmidecode | grep 'Product Name' // 查看服务器型号
# dmidecode | grep 'Serial Number' // 查看主板的序列号
# dmidecode -s system-serial-number // 查看系统序列号
# dmidecode -t memory // 查看内存信息
# dmidecode -t 11 // 查看OEM信息
# dmidecode | grep -A16 "Memory Device" | grep "Size" |sed 's/^[ \t]*//' // 现有内存数量和内存大小
# dmidecode | grep "Maximum Capacity" |sed "s/^[ \t]*//" // 最大支持内存容量：
Usage: dmidecode [OPTIONS]
Options are:
-d：(default:/dev/mem)从设备文件读取信息，输出内容与不加参数标准输出相同。 -h：显示帮助信息。 -s：只显示指定DMI字符串的信息。(string) -t：只显示指定条目的信息。(type) -u：显示未解码的原始条目内容。 -- dump-bin FILE: Dump the DMI data to a binary file. -- from-dump FILE: Read the DMI data from a binary file. -V：显示版本信息
DMI (Desktop Management Interface)
dmidecode在 Linux 系统下获取有关硬件方面的信息。dmidecode 遵循 SMBIOS/DMI 标准，以一种可读的方式dump出机器的DMI(Desktop Management Interface)信息, 其输出的信息包括 BIOS、系统、主板、处理器、内存、缓存等等, 既可以得到当前的配置，也可以得到系统支持的最大配置，比如说支持的最大内存数等。
aptitude install dmidecode # Debian/Ubuntu yum install dmidecode # Fedora pacman -S dmidecode # Arch Linux emerge -av dmidecode # Gentoo
查看内存槽数、那个槽位插了内存，大小是多少
dmidecode|grep -P -A5 "Memory\s+Device"|grep Size|grep -v Range
查看最大支持内存数
dmidecode|grep -P 'Maximum\s+Capacity'
查看槽位上内存的速率，没插就是unknown。
dmidecode|grep -A16 "Memory Device"|grep 'Speed'
dmidecode的输出格式一般如下：
Handle 0×0002 DMI type 2, 8 bytes Base Board Information Manufacturer:Intel Product Name: C440GX+ Version: 727281-0001 Serial Number: INCY92700942
其中的前三行都称为记录头(recoce Header), 其中包括了：
1、recode id(handle): DMI表中的记录标识符，这是唯一的,比如上例中的Handle 0×0002。
2、dmi type id: 记录的类型，譬如说:BIOS，Memory，上例是type 2，即”Base Board Information”
3、recode size: DMI表中对应记录的大小，上例为8 bytes.（不包括文本信息，所有实际输出的内容比这个size要更大。）
记录头之后就是记录的值：
4、decoded values: 记录值可以是多行的，比如上例显示了主板的制造商(manufacturer)、model、version以及serial Number。
dmidecode的使用方法
# dmidecode #这样将输出所有的dmi信息，你可能会被一大堆的信息吓坏，通常可以使用下面的方法。
# dmidecode -q
-q(–quite) 只显示必要的信息，这个很管用哦。
# dmidecode -t bios
# dmidecode -t bios, processor (这种方式好像不可以用，必须用下面的数字的方式)
# dmidecode -t 0,4 (显示bios和processor)
dmidecode到底支持哪些type?
这些可以在man dmidecode里面看到：
文本参数支持：
bios, system, baseboard, chassis, processor, memory, cache, connector, slot
数字参数支持很多：（见附录）
通过关键字查看信息：
比如只想查看序列号，可以使用:
# dmidecode -s system-serial-number
-s (–string keyword)支持的keyword包括：
bios-vendor
bios-version,
bios-release-date
system-manufacturer
system-product-name
system-version
system-serial-number
baseboard-manu-facturer
baseboard-product-name
baseboard-version
baseboard-serial-number
baseboard-asset-tag
chassis-manufacturer
chas-sis-version
chassis-serial-number
chassis-asset-tag,
processor-manufacturer
processor-version
5.示例
5.1 查看当前内存和支持的最大内存
Linux下，可以使用free或者查看meminfo来获得当前的物理内存：
# free total used free shared buffers cached Mem: 8182532 8010792 171740 0 148472 4737896 -/+ buffers/cache: 3124424 5058108 Swap: 4192956 3304 4189652 # grep MemTotal /proc/meminfo MemTotal: 8182532 kB
这里显示了当前服务器的物理内存是8GB。
服务器到底能扩展到多大的内存？
#dmidecode -t 16 # dmidecode 2.7 SMBIOS 2.4 present. Handle 0×0013, DMI type 16, 15 bytes. Physical Memory Array Location: System Board Or Motherboard Use: System Memory Error Correction Type: Multi-bit ECC Maximum Capacity: 64 GB （可扩展到64GB） Error Information Handle: Not Provided Number Of Devices: 4
但是，事实不一定如此，因此插槽可能已经插满了。也就是我们还必须查清这里的8G到底是4*2GB, 2*4GB还是其他？
如果是4*2GB，那么尽管可以扩展到64GB，但是插槽已经插满，无法扩展了：
#dmidecode -t 17 # dmidecode 2.7 SMBIOS 2.4 present. Handle 0×0015, DMI type 17, 27 bytes. Memory Device Array Handle: 0×0013 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 2048 MB 【插槽1有1条2GB内存】 Form Factor: DIMM Set: None Locator: DIMM00 Bank Locator: BANK Type: Other Type Detail: Other Speed: 667 MHz (1.5 ns) Manufacturer: Serial Number: BZACSKZ001 Asset Tag: RAM82 Part Number: MT9HTF6472FY-53EA2 Handle 0×0017, DMI type 17, 27 bytes. Memory Device Array Handle: 0×0013 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 2048 MB 【插槽2有1条2GB内存】 Form Factor: DIMM Set: None Locator: DIMM10 Bank Locator: BANK Type: Other Type Detail: Other Speed: 667 MHz (1.5 ns) Manufacturer: Serial Number: BZACSKZ001 Asset Tag: RAM83 Part Number: MT9HTF6472FY-53EA2 Handle 0×0019, DMI type 17, 27 bytes. Memory Device Array Handle: 0×0013 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 2048 MB 【插槽3有1条2GB内存】 Form Factor: DIMM Set: None Locator: DIMM20 Bank Locator: BANK Type: Other Type Detail: Other Speed: 667 MHz (1.5 ns) Manufacturer: Serial Number: BZACSKZ001 Asset Tag: RAM84 Part Number: MT9HTF6472FY-53EA2 Handle 0x001B, DMI type 17, 27 bytes. Memory Device Array Handle: 0×0013 Error Information Handle: Not Provided Total Width: 72 bits Data Width: 64 bits Size: 2048 MB 【插槽4有1条2GB内存】 Form Factor: DIMM Set: None Locator: DIMM30 Bank Locator: BANK Type: Other Type Detail: Other Speed: 667 MHz (1.5 ns) Manufacturer: Serial Number: BZACSKZ001 Asset Tag: RAM85 Part Number: MT9HTF6472FY-53EA2
根据上面输出可以发现，如果要扩展，只有将上面的内存条换成16GB的，才能达到4*16GB=64GB的最大支持内存。
附录：
dmidecode支持的数字参数：
Type Information
0 BIOS 1 System 2 Base Board 3 Chassis 4 Processor 5 Memory Controller 6 Memory Module 7 Cache 8 Port Connector 9 System Slots 10 On Board Devices 11 OEM Strings 12 System Configuration Options 13 BIOS Language 14 Group Associations 15 System Event Log 16 Physical Memory Array 17 Memory Device 18 32-bit Memory Error 19 Memory Array Mapped Address 20 Memory Device Mapped Address 21 Built-in Pointing Device 22 Portable Battery 23 System Reset 24 Hardware Security 25 System Power Controls 26 Voltage Probe 27 Cooling Device 28 Temperature Probe 29 Electrical Current Probe 30 Out-of-band Remote Access 31 Boot Integrity Services 32 System Boot 33 64-bit Memory Error 34 Management Device 35 Management Device Component 36 Management Device Threshold Data 37 Memory Channel 38 IPMI Device 39 Power Supply
一个查看硬件基本信息的脚本
[root@SC4306 test]# cat test.sh
#!/bin/bash
echo "IP:"
ifconfig |grep "inet addr"|grep -v 127.0.0.1|awk '{print $2}'|awk -F ':' '{print $2}'
echo "Product Name:"
dmidecode |grep Name
echo "CPU Info:"
dmidecode |grep -i cpu|grep -i version|awk -F ':' '{print $2}'
echo "Disk Info:"
parted -l|grep 'Disk /dev/sd'|awk -F ',' '{print " ",$1}'
echo "Network Info:"
lspci |grep Ethernet
echo "Memory Info:"
dmidecode|grep -A5 "Memory Device"|grep Size|grep -v No
echo "Memory number:"`dmidecode|grep -A5 "Memory Device"|grep Size|grep -v No|wc -l`
输出结果：
[root@SC4306 test]# bash test.sh
IP:
10.0.17.6
10.0.250.6
Product Name:
Product Name: PowerEdge R720
SKU Number: SKU=NotProvided;ModelName=PowerEdge R720
Product Name: 0DCWD1
CPU Info:
Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz
Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz
Disk Info:
Disk /dev/sda: 1074GB
Disk /dev/sdb: 18.9TB
Network Info:
01:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
01:00.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
02:00.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
Memory Info:
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Size: 16384 MB
Memory number:8
转载自：
