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Calculate total memory using free -m

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# 1  
Old 07-14-2017
Calculate total memory using free -m


I am trying to calculate memory used by Linux System
free -m
total used free shared buffers cached
Mem: 32109 31010 1099 0 3600 7287
-/+ buffers/cache: 20121 11987
Swap: 10239 1282 8957

Now according to my requirement Im calculating memory using below cmd
free -m | awk 'NR==3{printf "Memory Usage: (%.2f%%)\n", $3*100/32109 }'

But in the above code 32109 is hard coded(Which is total memory highlighted in red color) now I want to make this as generic, how do I pass that value 32109 as a variable in code. How can this be achieved

Last edited by sam@sam; 07-14-2017 at 02:30 AM..
# 2  
Old 07-14-2017
Hello sam@sam,

Could you please let me know if this helps you.
free -m | awk 'NR==2{val=$2;next} NR==3{printf("Memory Usage: %.2f%\n", ($3*100)/val)}'

R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
# 3  
Old 07-14-2017
Perfect its working
Thanks you RavinderSingh, for your help.

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