diff --git a/knowledge base/check or set the cpu frequency or governor.placeholder b/knowledge base/check or set the cpu frequency or governor.placeholder
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+# Check or set the CPU frequency or governor
+
+```sh
+cat '/sys/devices/system/cpu/cpufreq/'*'/affected_cpus'
+cat '/sys/devices/system/cpu/cpufreq/'*'/scaling_available_governors'
+
+# Get the current active governor.
+cat '/sys/devices/system/cpu/cpufreq/policy0/scaling_governor'
+cat '/sys/devices/system/cpu/cpufreq/'*'/scaling_governor'
+
+# Enable a new governor.
+echo 'schedutil' | sudo tee '/sys/devices/system/cpu/cpufreq/policy0/scaling_governor'
+echo 'powersave' | sudo tee '/sys/devices/system/cpu/cpufreq/policy1/scaling_governor'
+
+# Do not boost the CPU frequency for nice loads.
+echo 1 | sudo tee '/sys/devices/system/cpu/cpufreq/ondemand/ignore_nice_load'
+```