show_ram.sh
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show_ram.sh
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	#!/bin/bash
	#
	# Module: vyos-show-ram.sh
	# Displays memory usage information in minimalistic format
	#
	# Copyright (C) 2019 VyOS maintainers and contributors
	#
	# This program is free software; you can redistribute it and/or modify
	# it under the terms of the GNU General Public License version 2 as
	# published by the Free Software Foundation.
	#
	# This program is distributed in the hope that it will be useful,
	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	# GNU General Public License for more details.
	#
	# You should have received a copy of the GNU General Public License
	# along with this program. If not, see <http://www.gnu.org/licenses/>.

	MB_DIVISOR=1024

	TOTAL=$(cat /proc/meminfo \| grep -E "^MemTotal:" \| awk -F ' ' '{print $2}')
	FREE=$(cat /proc/meminfo \| grep -E "^MemFree:" \| awk -F ' ' '{print $2}')
	BUFFERS=$(cat /proc/meminfo \| grep -E "^Buffers:" \| awk -F ' ' '{print $2}')
	CACHED=$(cat /proc/meminfo \| grep -E "^Cached:" \| awk -F ' ' '{print $2}')

	DISPLAY_FREE=$(( ($FREE + $BUFFERS + $CACHED) / $MB_DIVISOR ))
	DISPLAY_TOTAL=$(( $TOTAL / $MB_DIVISOR ))
	DISPLAY_USED=$(( $DISPLAY_TOTAL - $DISPLAY_FREE ))

	echo "Total: $DISPLAY_TOTAL"
	echo "Free: $DISPLAY_FREE"
	echo "Used: $DISPLAY_USED"