linux 查看cpu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