cpufreq-info: add page (#1834)

pages/linux/cpufreq-info.md

@@ -0,0 +1,27 @@
+# cpufreq-info
+
+> A tool to show CPU frequency information.
+
+- Show CPU frequency information for all CPUs:
+
+`cpufreq-info`
+
+- Show CPU frequency information for the specified CPU:
+
+`cpufreq-info -c {{cpu_number}}`
+
+- Show the minimum, maximum CPU frequency and currently used policy in table format:
+
+`cpufreq-info -o`
+
+- Show available CPU frequency policies:
+
+`cpufreq-info -g`
+
+- Show current CPU work frequency in a human-readable format, according to the cpufreq kernel module:
+
+`cpufreq-info -f -m`
+
+- Show current CPU work frequency in a human-readable format, by reading it from hardware (only available to root):
+
+`sudo cpufreq-info -w -m`