显示系统中共有多少个CPU核心: 输入以下命令: # cd /sys/devices/system/cpu # ls -l 示例: total 0 drwxr-xr-x 4 root root 0 Apr 2 12:03 cpu0 drwxr-xr-x 4 root root 0 Feb 15 07:06 cpu1 drwxr-xr-x 4 root root 0 Feb 15 07:06 cpu2 drwxr-xr-x 4 root root 0 Feb 15 07:06 cpu3 drwxr-xr-x 4 ro…