How to get Memory Usage in a variable using shell script

Question

I am using the following script to get memory usage value, I want this value in variable so that i can apply 'if' condition on that value.Please suggest

@echo off
free -m | awk 'NR==2{printf "Memory Usage: %s/%sMB (%.2f%)\n", $3,$2,$3*100/$2 }'

songyuanyao · Accepted Answer · 2015-11-18 08:18:04Z

4

You might want

memory_usage=`free -m | awk 'NR==2{print $3*100/$2 }'`
if [ `echo "${memory_usage} > 90.0" | bc` -eq 1 ] ; then
    echo " > 90.0 "
else
    echo " <= 90.0 "
fi

Note how to save the result of command into variable, and how to compare floating-point number.

edited Nov 18, 2015 at 8:18

answered Nov 18, 2015 at 7:48

songyuanyao

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2 Comments

Mohsin Inayat Khan Over a year ago

Thanks for the quick reply, can you please guide me how i can store only the numeric value in a variable and apply if condition on it. Thanks

songyuanyao Over a year ago

@MohsinInayatKhan Done.

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