In Linux, determine the number of CPU physical cores, whether it is hyper-threading or multi-core

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1. view the number of physical CPUs # Cat/proc/cpuinfo | grep "physical ID" | sort | uniq | WC-l   2. view the number of logical CPUs # Cat/proc/cpuinfo | grep "processor" | WC-l   3. Check the CPU Cores # Cat/proc/cpuinfo | grep "cores" | uniq   4. view the CPU clock speed # Cat/proc/cpuinfo | grep MHz | uniq                     #Uname- Linux euis1 2.6.9-55. elsmp #1 SMP Fri APR 20 17:03:35 EDT 2007 i686 i686 i386 GNU/Linux (View the kernel information of the current operating system)   #CAT/etc/issue | grep Linux Red Hat Enterprise Linux as Release 4 (nahant Update 5) (View the released version of the current operating system)   #CAT/proc/cpuinfo | grep name | cut-F2-D: | uniq-C 8Intel (r) Xeon (r) CPU e5410 @ 2.33 GHz (We can see eight logical CPUs and the CPU model)   #CAT/proc/cpuinfo | grep physical | uniq-C 4Physical ID: 0 4Physical ID: 1 (It means two 4-core CPUs)   #Getconf long_bit 32 (This indicates that the current CPU runs in 32bit mode, but does not indicate that the CPU does not support 64bit)   #CAT/proc/cpuinfo | grep flags | grep 'lm '| WC-l 8 (If the result is greater than 0, 64bit computing is supported. lm indicates long mode, and Lm indicates 64bit)           How to obtain CPU details: Linux Command: CAT/proc/cpuinfo Use commands to determine the number of physical CPUs and cores: Logical CPU count: # Cat/proc/cpuinfo | grep "processor" | WC-l Number of physical CPUs: # Cat/proc/cpuinfo | grep "physical ID" | sort | uniq | WC-l Number of cores in each physical CPU: # Cat/proc/cpuinfo | grep "CPU cores" | WC-l Is it hyper-threading? If two logical CPUs have the same core ID, hyper-threading is enabled. The number of logical CPUs (possibly core, threads, or both) in each physical CPU: # Cat/proc/cpuinfo | grep "Siblings"               1. View CPU information command CAT/proc/cpuinfo 2. Run the command CAT/proc/meminfo to view memory information. 3. Command fdisk-L to view hard disk Information

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