How to get CPU information in Linux

We can get the information we need in/proc/cpuinfo.

1. The current CPU model

[root@ localhost ~]# cat/proc/cpuinfo |grep ' model name ' |uniq

Model NAME:AMD Opteron (tm) Processor 6140

2. Current CPU operating mode

[Root@localhost tmp]# getconf Long_bit

32

Indicates that the current CPU is running in 32-bit environments

3. Whether the current CPU supports 64-bit environments

[root@ localhost ~]# cat/proc/cpuinfo |grep ' lm ' |uniq

FLAGS:FPU VME de PSE TSC MSR PAE MCE cx8 APIC MTRR PGE MCA Cmov Pat PSE36 Clflush MMX FXSR SSE SSE2 HT syscall NX Mmxext fxsr_opt PDPE1GB rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc extd_apicid amd_dcm PNI Monitor cx1 6 popcnt lahf_lm cmp_legacy SVM extapic cr8_legacy ABM sse4a misalignsse 3dnowprefetch osvw IBS skinit WDT NODEID_MSR NPT LBRV Svm_lock Nrip_save Pausefilter

LM refers to long mode, support LM is 64bit this side has output, the description is to support 64-bit can replace the command last Uniq to Wc-l to see support 64-bit core number

4. Number of physical CPUs

Physical ID is the same as the same physical CPU

[root@ localhost ~]# cat/proc/cpuinfo |grep "Physical id" |sort |uniq

Physical id:0

Physical Id:1

In this case, this host has two physical CPUs

5. The number of core in each physical CPU

[root@ localhost ~]# cat/proc/cpuinfo | grep "CPU Cores" | Uniq

CPU Cores:8

Each physical CPU has 8 core that hosts a total of 16 core

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