Script to find memory usage on Ubuntu
This simple script will show the total memory, free memory and percentage of memory used. Have tested it on Ubuntu 14/16 but will work on CentOS as well
#!/bin/bash
freemem=$(($(free -m |grep "buffers/cache:"|awk '{print $4}')))
totalmem=$(($(free -m |awk 'NR==2 {print $2}')))
usage=$(($totalmem-$freemem))
echo "Memory used: $usage"
echo "Total memory: $totalmem"
usage=$(($usage*100 / $totalmem))
echo "Usage percentage: $usage"
echo "Free memory: $freemem"
echo "$TIMESTAMP $totalmem $usage $freemem"
#!/bin/bash
freemem=$(($(free -m |grep "buffers/cache:"|awk '{print $4}')))
totalmem=$(($(free -m |awk 'NR==2 {print $2}')))
usage=$(($totalmem-$freemem))
echo "Memory used: $usage"
echo "Total memory: $totalmem"
usage=$(($usage*100 / $totalmem))
echo "Usage percentage: $usage"
echo "Free memory: $freemem"
echo "$TIMESTAMP $totalmem $usage $freemem"
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