Using awk to calculate ram usage from /proc/meminfo

I want to use awk only to calculate memory usage from /proc/meminfo file. I tried to do awk ‘NR==1 || NR==2 {print $2} it prints the 2nd column in the first 2 lines ( MemTotal and MemFree ) but I want to output the difference. Do you have any ideas?

Solution

This should work:

awk 'NR==1{T=$2} NR==2{F=$2; print(T-F); exit}' /proc/meminfo

Answered By — Mark Setchell

Answer Checked By — Timothy Miller (FixIt Admin)

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