经常要查看Linux服务器的CPU、内存、操作系统版本等信息，总结一下常用的命令
1.查看CPU型号（32个逻辑CPU）
[[email protected] ~]# cat /proc/cpuinfo |grep "name" |cut -f2 -d: |uniq -c
32 Intel(R) Xeon(R) CPU E5-4620 v2 @ 2.60GHz
2.查看物理CPU个数（两个16核CPU）
[[email protected] ~]# cat /proc/cpuinfo | grep "physical"| sort |uniq -c
32 address sizes: 46 bits physical, 48 bits virtual
16 physical id: 0
16 physical id: 1
3.查看CPU运行在多少位模式下面
[[email protected] ~]# getconf LONG_BIT
64
4.下面的结果大于0，说明支持64位操作系统
[[email protected] ~]# cat /proc/cpuinfo | grep flags | grep ‘ lm ‘ | wc -l
32
5.查看系统物理内存的大小
[[email protected] ~]# free -m
total used free shared buffers cached
Mem: 32051 31806 244 0 58 30654
-/+ buffers/cache: 1093 30958
Swap: 15999 0 15999
6.查看内存详细信息
[[email protected] ~]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 62
model name : Intel(R) Xeon(R) CPU E5-4620 v2 @ 2.60GHz
stepping : 4
microcode : 1064
cpu MHz : 2600.065
cache size : 20480 KB
physical id : 0
siblings : 16
core id : 0
cpu cores : 8
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
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 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms
bogomips : 5200.13
clflush size : 64
7.查看服务器安装的是哪个发行版本
[[email protected] ~]# cat /etc/redhat-release
CentOS release 6.6 (Final)
8.查看OS的版本是64位的还是32位的
[[email protected] ~]# uname -r
2.6.32-504.el6.x86_64
[[email protected] ~]# uname -a
Linux nginx.yc.jzhnm.com 2.6.32-504.el6.x86_64 #1 SMP Wed Oct 15 04:27:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
9.查看服务器的硬件信息
[[email protected] ~]# dmidecode |grep Vendor #处理器厂商
Vendor: Dell Inc.
[[email protected] ~]# dmidecode |grep Product #服务器型号
Product Name: PowerEdge R820
Product Name: 0JC2W3