get available memory in gb using single bash shell command

Question

following command returns available memory in kilobytes

cat /proc/meminfo | grep MemFree | awk '{ print $2 }'

can some one suggest single command to get the available memory in gb?

Answer 1

Just a slight modification to your own magical incantation:

awk '/MemFree/ { printf "%.3f \n", $2/1024/1024 }' /proc/meminfo

P.S.: Dear OP, if you find yourself invoking grep & awk in one line you're most likely doing it wrong ;} ... Same with invoking cat on a single file; that's hardly ever warranted.