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Create ls-qubes.sh

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A small script which will show number of active running Qubes and the total RAM used by all Qubes.
Example Output: 9Q|13.3G = 9 Qubes are running (including dom0), 13.3 GB total RAM usage
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[799] 2018-04-03 21:56:18 +02:00 committed by GitHub
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#!/bin/bash
# ls-qubes.sh
# List Qubes and total RAM used by all Qubes
# Usage: ls-qubes.sh
# Output: 9Q|13.3G
# ... this means: 9 Qubes running, total RAM consumption 13.3GB
# This script has to be placed in dom0 and must be made executable via chmod +x <FILENAME>
# suggested location ~/bin as this location is included in the PATH environment variable
# How to run:
#
# The output of this script can be placed in the XFCE top bar, via:
# 1) Right Click on bar > Panel > Add new items > Generic Monitor
# 2) after adding the generic monitor plabel, right click on it and choose properties
# 3) add this script to the command field.
#
# Initial version 03.04.18 by https://github.com/one7two99
#
ram_sum="("$(xl list | awk '{print $3}' | tail -n +2 | paste -s -d+ -)")/1000"
ram_sum=$(bc <<< "scale=1;$ram_sum")
qubes_sum=$(xl list 2> /dev/null | tail -n +2 | wc -l)
echo $qubes_sum"Q|"$ram_sum"G"