linux 查看系统版本及硬件信息

----------------CPU----------------

查看CPU型号等详细信息

1）通用方法

cat /proc/cpuinfo

processor : 0

vendor_id : GenuineIntel

cpu family : 6

model : 46

model name : Intel(R) Xeon(R) CPU E7520 @ 1.87GHz

stepping : 6

cpu MHz : 1064.000

cache size : 18432 KB

physical id : 0

……

# 总核数 = 物理CPU个数 X 每颗物理CPU的核数

# 总逻辑CPU数 = 物理CPU个数 X 每颗物理CPU的核数 X 超线程数

① 查看物理CPU的个数

#cat /proc/cpuinfo |grep "physical id"|sort |uniq|wc -l

2

② 查看逻辑CPU的个数

#cat /proc/cpuinfo |grep "processor"|wc -l

24

③ 查看CPU是几核

#cat /proc/cpuinfo |grep "cores"|uniq

6

2）CentOS方法

lscpu

Architecture: i686

CPU op-mode(s): 32-bit, 64-bit

CPU(s): 16

Thread(s) per core: 2

Core(s) per socket: 4

CPU socket(s): 2

Vendor ID: GenuineIntel

CPU family: 6

Model: 46

Stepping: 6

CPU MHz: 1064.000

Virtualization: VT-x

L1d cache: 32K

L1i cache: 32K

L2 cache: 256K

L3 cache: 18432K

----------------内存----------------

查看内存使用情况

free -m

total used free shared buffers cached

Mem: 32158 2383 29775 0 466 862

-/+ buffers/cache: 1054 31104

Swap: 0 0 0

查看内存详信息

cat /proc/meminfo

MemTotal: 14409828 kB

MemFree: 7795036 kB

Buffers: 361792 kB

Cached: 5762836 kB

SwapCached: 0 kB

Active: 2755200 kB

……

查看内存插槽总数、已使用的插槽数及每插槽内存条容量

dmidecode|grep -P -A5 "Memory\s+Device"|grep Size|grep -v Range

Size: 4096 MB

Size: 4096 MB

Size: No Module Installed

Size: No Module Installed

……

查看支持最大内存容量

dmidecode|grep -P 'Maximum\s+Capacity'

Maximum Capacity: 256 GB

----------------磁盘----------------

查看磁盘使用情况 2秒钟刷新一次

iostat -d -x /dev/sda1 2

Linux 2.6.18-164.el5 (meter1) 07/22/2015

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util

sda1 0.00 0.22 0.00 0.15 0.07 2.91 19.83 0.00 3.96 0.84 0.01

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util

sda1 0.00 2.00 0.00 6.50 0.00 68.00 10.46 0.02 3.62 0.38 0.25

----------------网卡----------------

dmesg |grep -i eth

lspci |grep -i eth

ifconfig -a

ip link

[b]----------------查看HBA卡----------------

[/b]

cat /sys/class/fc_host/host*/port_name

所有关于HBA的信息都可以在cat /sys/class/fc_host/host*/ 目录下通过cat查看。

如速率 cat /sys/class/fc_host/host*/speed

如状态 cat /sys/class/fc_host/host*/port_state

如类型 cat /sys/class/fc_host/host*/port_type 等等

----------------操作系统版本----------------

查看当前操作系统内核信息

uname -a

Linux meter1 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

查看当前操作系统发行版信息

1）通用方法

cat /etc/issue |grep Linux

Red Hat Enterprise Linux Server release 5.4 (Tikanga)

2) 可用方法

cat /etc/redhat-release

CentOS Linux release 6.0 (Final)

3）只支持redhat等部分linux

lsb_release -a

LSB Version: :core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32:graphics-3.1-noarch

Distributor ID: RedHatEnterpriseServer

Description: Red Hat Enterprise Linux Server release 5.4 (Tikanga)

Release: 5.4

Codename: Tikanga

4）查看当前操作系统内核GCC版本

cat /proc/version

Linux version 2.6.18-164.el5 (mockbuild@x86-003.build.bos.redhat.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-46)) #1 SMP Tue Aug 18 15:51:48 EDT 2009

----------------综合信息----------------

系统硬件运行状态信息（即开机后的硬件运行状态信息）

dmesg

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

-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

-V, --version Display the version and exit

查看PCI信息，即主板所有硬件槽信息

lspci