1. Check the number of physical CPUs
#cat /proc/cpuinfo |grep "physical id"|sort |uniq|wc -l
2. Check the number of logical CPUs (online learning video tutorial sharing: linux video tutorial）
#cat /proc/cpuinfo |grep "processor"|wc -l
3. Check the number of cores of the CPU
#cat /proc/cpuinfo |grep "cores"|uniq
4. Check the main frequency of the CPU
#cat /proc/cpuinfo |grep MHz|uniq
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