free

#!/bin/bash
# return free memory in MB

#method 1: short but slow
##########################
#top="/usr/bin/top"
#grep="/usr/bin/grep"
#cut="/usr/bin/cut"
#top -l 1 | grep ^PhysMem |cut -c62-66

#method 2:
##########################
vm_stat="/usr/bin/vm_stat"
awk="/usr/bin/awk"
free="$(( $(vm_stat | awk '/free/ {gsub(/\./, "", $3); print $3}') * 4096 / 1048576)) MiB free RAM"
echo="/bin/echo"
echo $free


exit