Centos7硬件信息查询cpu,mem,fdisk，网卡

一、所有机器硬件信息：
dmesg |more

二、CPU信息：
cat /proc/cpuinfo 查看有几核
lscpu 查看cpu的统计信息

blue@blue-pc:~$ lscpu
Architecture:          i686            #cpu架构
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian   #小尾序
CPU(s):                4               #总共有4核
On-line CPU(s) list:   0-3Thread(s) per core:    1               #每个cpu核，只能支持一个线程，即不支持超线程
Core(s) per socket:    4               #每个cpu，有4个核
Socket(s):             1               #总共有1一个cpu
Vendor ID:             GenuineIntel    #cpu产商 intel
CPU family:            6Model:                 42Stepping:              7CPU MHz:               1600.000BogoMIPS:              5986.12Virtualization:        VT-x            #支持cpu虚拟化技术
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              6144K

三、MEM内存：
cat /proc/meminfo
free -m
top
dmidecode -t memory 查看内存硬件信息

[jason@mofei zabbix]$ sudo dmidecode -t memory
# dmidecode 2.12
SMBIOS 2.4 present.
Handle 0x1000, DMI type 16, 15 bytes
Physical Memory Array
Location: Other
Use: System Memory
Error Correction Type: Multi-bit ECC
Maximum Capacity: 2 GB                        --最大支持2G内存
Error Information Handle: Not Provided
Number Of Devices: 1                        --只有一个槽位
Handle 0x1100, DMI type 17, 21 bytes
Memory Device
Array Handle: 0x1000
Error Information Handle: 0x0000
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB                                --使用槽位，插上一条2G内存条
Form Factor: DIMM
Set: None
Locator: DIMM 0
Bank Locator: Not Specified
Type: RAM
Type Detail: None

四、磁盘信息：
1.df -Th 查看磁盘上各目录大小
2.fdisk -h 查看磁盘分区及大小详细信息，包括U盘
3.cat /proc/partitions
4.lsblk查看磁盘和分区分布
[root@cp-mysql01 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 1.8T 0 disk
├─sda1 8:1 0 500M 0 part /boot
└─sda2 8:2 0 1.8T 0 part
├─centos-root 253:0 0 50G 0 lvm /
├─centos-swap 253:1 0 15.8G 0 lvm [SWAP]
├─centos-home 253:2 0 10G 0 lvm /home
└─centos-data 253:3 0 1.8T 0 lvm /data

五、NET网卡信息：
1.ethtool em1 指定 查看网卡信息

2.ifconfig
3.cat /etc/sysconfig/network-scripts/ifcf-em1
4.lscpi |grep -i 'eth' 查看网卡硬件信息
[root@cp-mysql01 ~]# lspci |grep -i 'eth'
06:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01)
06:00.1 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01)

主板信息：

lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) #主板芯片
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) #显卡
00:14.0 USB controller: Intel Corporation Panther Point USB xHCI Host Controller (rev 04) #usb控制器00:16.0 Communication controller: Intel Corporation Panther Point MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio Controller (rev 04) #声卡
00:1c.0 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 1 (rev c4) #pci 插槽
00:1c.2 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 3 (rev c4)
00:1c.3 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 4 (rev c4)
00:1d.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Panther Point LPC Controller (rev 04)
00:1f.2 IDE interface: Intel Corporation Panther Point 4 port SATA Controller [IDE mode] (rev 04) #硬盘接口
00:1f.3 SMBus: Intel Corporation Panther Point SMBus Controller (rev 04)
00:1f.5 IDE interface: Intel Corporation Panther Point 2 port SATA Controller [IDE mode] (rev 04) #硬盘接口
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) #网卡
03:00.0 PCI bridge: Integrated Technology Express, Inc. Device 8893 (rev 41)

lspci -v/-vv显示更详细的主板信息
lspci -t查看设备树

查看bios信息

# dmidecode -t bios
......
BIOS Information
Vendor: American Megatrends Inc.
Version: 4.6.5
Release Date: 04/25/2012
.......
BIOS Revision: 4.6......

dmidecode以一种可读的方式dump出机器的DMI（Desktop Management Interface）信息，包括硬件以及BIOS，既可以得到当前配置也知道系统支持最大配置，比如支持最大内存等。