linux查看系统的硬件信息

linux查看系统的硬件信息，并不像windows那么直观，这里我罗列了查看系统信息的实用命令，并做了分类，实例解说。

cpu

lscpu命令，查看的是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:   0-3

Thread(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:            6

Model:                 42

Stepping:              7

CPU MHz:               1600.000

BogoMIPS:              5986.12

Virtualization:        VT-x            #支持cpu虚拟化技术

L1d cache:             32K

L1i cache:             32K

L2 cache:              256K

L3 cache:              6144K

查看/proc/cpuinfo,可以知道每个cpu信息，如每个CPU的型号，主频等。

#cat /proc/cpuinfo

processor    : 0

vendor_id    : GenuineIntel

cpu family    : 6

model        : 42

model name    : Intel(R) Core(TM) i5-2320 CPU @ 3.00GHz

.....

上面输出的是第一个cpu部分信息，还有3个cpu信息省略了。

内存

概要查看内存情况

free -m

             total       used       free     shared    buffers     cached

Mem:          3926       3651        274          0         12        404

-/+ buffers/cache:       3235        691

Swap:         9536         31

这里的单位是MB，总共的内存是3926MB。

查看内存详细使用

# cat /proc/meminfo

MemTotal:        4020868 kB

MemFree:          230884 kB

Buffers:            7600 kB

Cached:           454772 kB

SwapCached:          836 kB

.....

查看内存硬件信息

dmidecode -t memory

# dmidecode 2.11

SMBIOS 2.7 present.

Handle 0x0008, DMI type 16, 23 bytes

Physical Memory Array

    Location: System Board Or Motherboard

....

    Maximum Capacity: 32 GB

....

Handle 0x000A, DMI type 17, 34 bytes

....

Memory Device

    Array Handle: 0x0008

    Error Information Handle: Not Provided

    Total Width: 64 bits

    Data Width: 64 bits

    Size: 4096 MB

.....

我的主板有4个槽位，只用了一个槽位，上面插了一条4096MB的内存。

磁盘

查看硬盘和分区分布

# lsblk

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT

sda      8:0    0 465.8G  0 disk

├─sda1   8:1    0     1G  0 part /boot

├─sda2   8:2    0   9.3G  0 part [SWAP]

├─sda3   8:3    0  74.5G  0 part /

├─sda4   8:4    0     1K  0 part

├─sda5   8:5    0 111.8G  0 part /home

└─sda6   8:6    0 269.2G  0 part

显示很直观

如果要看硬盘和分区的详细信息

# fdisk -l

Disk /dev/sda: 500.1 GB, 500107862016 bytes

255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 4096 bytes

I/O size (minimum/optimal): 4096 bytes / 4096 bytes

Disk identifier: 0x00023728

   Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *        2048     2148351     1073152   83  Linux

/dev/sda2         2148352    21680127     9765888   82  Linux swap / Solaris

/dev/sda3        21680128   177930239    78125056   83  Linux

/dev/sda4       177932286   976771071   399419393    5  Extended/dev/sda5       177932288   412305407   117186560   83  Linux

/dev/sda6       412307456   976771071   282231808   83  Linux

网卡

查看网卡硬件信息

# lspci | grep -i 'eth'

02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)

查看系统的所有网络接口

# ifconfig -a

eth0      Link encap:以太网  硬件地址 b8:97:5a:17:b3:8f

          .....

lo        Link encap:本地环回

          .....

或者是

ip link show

1: lo: <LOOPBACK> mtu 16436 qdisc noqueue state DOWN

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether b8:97:5a:17:b3:8f brd ff:ff:ff:ff:ff:ff

如果要查看某个网络接口的详细信息，例如eth0的详细参数和指标

# ethtool eth0

Settings for eth0:

    Supported ports: [ TP MII ]

    Supported link modes:   10baseT/Half 10baseT/Full

                            100baseT/Half 100baseT/Full

                            1000baseT/Half 1000baseT/Full #支持千兆半双工，全双工模式

    Supported pause frame use: No

    Supports auto-negotiation: Yes #支持自适应模式，一般都支持

    Advertised link modes:  10baseT/Half 10baseT/Full

                            100baseT/Half 100baseT/Full

                            1000baseT/Half 1000baseT/Full

    Advertised pause frame use: Symmetric Receive-only

    Advertised auto-negotiation: Yes #默认使用自适应模式

    Link partner advertised link modes:  10baseT/Half 10baseT/Full

                                         100baseT/Half 100baseT/Full

    .....

    Speed: 100Mb/s #现在网卡的速度是100Mb,网卡使用自适应模式，所以推测路由是100Mb，导致网卡从支持千兆，变成要支持百兆

    Duplex: Full   #全双工

    .....

    Link detected: yes    #表示有网线连接，和路由是通的

其他

查看pci信息，即主板所有硬件槽信息。

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)

如果要更详细的信息:lspci -v 或者 lspci -vv

如果要看设备树:lscpi -t

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。这些信息包括了硬件以及BIOS，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。

如果要查看所有有用信息