$ cat /proc/cpuinfo

$ cat /proc/cpuinfo | grep processor

$ cat /proc/version

$ vmstat -s

$ vmstat -s | grep memory

$ cat /proc/cpuinfo | grep processor

$ ls -al /sys/devices/system/cpu/

$ echo 0 | sudo tee /sys/devices/system/cpu/cpu1/online

$ echo 1 | sudo tee /sys/devices/system/cpu/cpu1/online