[root@vrouter1 ~]# cat /sys/devices/system/cpu/online 0-33,35,37-63 [root@vrouter1 ~]# cat /sys/devices/system/cpu/offline 34,36,64-143 [root@vrouter1 ~]# echo 0 > /sys/devices/system/cpu/cpu34/online
https://www.cyberciti.biz/faq/debian-rhel-centos-redhat-suse-hotplug-cpu/