Created
August 27, 2014 12:41
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drainswap
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#!/bin/bash | |
free_data="$(free)" | |
mem_data="$(echo "$free_data" | grep 'Mem:')" | |
free_mem="$(echo "$mem_data" | awk '{print $4}')" | |
buffers="$(echo "$mem_data" | awk '{print $6}')" | |
cache="$(echo "$mem_data" | awk '{print $7}')" | |
total_free=$((free_mem + buffers + cache)) | |
used_swap="$(echo "$free_data" | grep 'Swap:' | awk '{print $3}')" | |
echo -e "Free memory:\t$total_free kB ($((total_free / 1024)) MB)\nUsed swap:\t$used_swap kB ($((used_swap / 1024)) MB)" | |
if [[ $used_swap -eq 0 ]]; then | |
echo "Congratulations! No swap is in use." | |
elif [[ $used_swap -lt $total_free ]]; then | |
echo "Freeing swap..." | |
sudo swapoff -a | |
sudo swapon -a | |
else | |
echo "Not enough free memory. Exiting." | |
exit 1 | |
fi |
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