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#!/bin/sh
meminfo=$(awk '
/^MemTotal:/ {Total=$2*1024}
/^MemAvailable:/ {Available=$2*1024}
/^MemFree:/ {Free=$2*1024}
/^Buffers:/ {Buffers=$2*1024}
/^Cached:/ {Cached=$2*1024}
/^SReclaimable:/ {SReclaimable=$2*1024}
/^Shmem:/ {Shmem=$2*1024}
END {
print Total ":" Available ":" Free ":" Buffers ":" Cached ":" SReclaimable ":" Shmem}' /proc/meminfo)
echo "$meminfo" |
while IFS=: read -r t a f b c sr sh; do
memfree=$(echo "$a $t" | awk '{printf "%.3f", ($1 / $2) * 100}')
memused=$(echo "$memfree" | awk '{printf "%.3f", (100 - $1)}')
# Percentage values
# TODO: other values, controllable by flags?
echo "$memfree $memused"
done
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