Linux环境下查看服务器硬件信息
查看CPU型号
cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c
16Intel(R) Xeon(R) CPUX5560@ 2.80GHz
查看物理CPU个数
cat /proc/cpuinfo | grep physical | uniq -c
1 physical id: 1
1 physical id: 0
查看CPU运行模式：32位或者64位，如果是32位的话并不代表不能运行在64位下
getconf LONG_BIT
64
查看是否CPU支持64位系统，如果值大于0，则支持64位运算，lm指long mode
cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l
1
查看内存信息
cat /proc/meminfo
查看当前系统内核信息
uname -a
查看当前操作系统内核信息
cat /etc/issue | grep Linux
Red Hat Enterprise Linux Server release 5.4 (Tikanga)
查看网卡信息
dmesg | grep -i eth
查看服务器型号
dmidecode | grep "Product Name"
Product Name: PowerEdge R710
Product Name: 0VWN1R
linux下查看硬件信息的指令，除了我们常见的比如/proc/cpuinfo,/proc/meminfo等，还有一个指令给大家介绍怎么查看硬件信息--dmidecode, 希望对大家有点用处。
dmidecode是读取DMI的信息显示给大家的。Dmidecode的输出是若干DMI(Desktop Management Interface)表的记录
[root@mail proc]# 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 Only display the entries of given type
-u, --dump Do not decode the entries
-V, --version Display the version and exit
以上是它的帮助信息，最有用的当然是参数-t了，它后面可跟的参数有：
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
类型归纳一下如下：
bios 0, 13
system 1, 12, 15, 23, 32
baseboard 2, 10
chassis 3
processor 4
memory 5, 6, 16, 17
cache 7
connector 8
slot 9
比如查看CPU信息：
dmidecode -t 4 或者 dmidecode -t porcessor
两者的功能是一样的，查看内存 dmidecode -t 5 或 dmidecode -t memory
最常用的可能就是这两个指令了，尤其是查看内存，dmidecode -t memory会显示哪个插槽插了内存，容量多大的以及频率等信息
