power menu, redshift, polybar

.config/polybar/scripts/system-cpu-frequency/README.md

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+# Script: system-cpu-frequency
+
+A shell script that shows the average core frequency (average over number, not over time) in GHz.
+
+
+## Module
+
+```ini
+[module/system-cpu-frequency]
+type = custom/script
+exec = ~/polybar-scripts/system-cpu-frequency.sh
+interval = 10
+```

.config/polybar/scripts/system-cpu-frequency/system-cpu-frequency.sh

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+#!/bin/sh
+
+c=0;t=0
+
+awk '/MHz/ {print $4}' < /proc/cpuinfo | (while read -r i
+do
+    t=$( echo "$t + $i" | bc )
+    c=$((c+1))
+done
+echo "scale=2; $t / $c / 1000" | bc | awk '{print $1" GHz"}')