cpupower

List all CPUs

$ sudo cpupower -c all info

$ sudo cpupower -c all frequency-set --governor powersave

$ sudo cpupower -c 0 frequency-info -g | grep "analyzing\|governors"

$ sudo cpupower -c 4 frequency-info -w -m

cpupower [-c cpus] subcommand [options]

cpupower is a collection of tools for CPU power management and tuning. It replaces the older cpufrequtils package and provides unified access to frequency scaling, idle states, and power features.
Subcommands include frequency-info, frequency-set, idle-info, idle-set, and monitor.

-c, --cpu cpus

Specify CPU(s) to operate on (e.g., 0, 1-3, all)

Show current frequency settings

Modify frequency settings

Show idle state information

Monitor CPU frequency and idle states

Set frequency governor

Human-readable output

Requires root privileges for setting values. Available governors and features depend on hardware and kernel configuration. Replaces cpufreq-info and cpufreq-set.

cpufreq-info(1), cpufreq-set(1), turbostat(8)