get essential info from remote hosts

overalinfo.sh

#!/bin/bash

USEPRIVKEY="-i ~/.ssh/open.key"

#Put your server hostnames here:
for line in {server1,server2,server3}
do
    echo "$line:"
    echo -n "CPU Cores:"
    ssh -q $USEPRIVKEY $line "cat /proc/cpuinfo | grep processor | wc -l"
    echo -n "Total Memory:"
    ssh -q $USEPRIVKEY $line "cat /proc/meminfo | tr -s ' ' | grep MemTotal | cut -d' ' -f2"
    echo -n "Free Memory:"
    ssh -q $USEPRIVKEY $line "cat /proc/meminfo | tr -s ' ' | grep MemFree | cut -d' ' -f2"
    echo -n "Free Disk Space:"
    ssh -q $USEPRIVKEY $line "df -h --total | grep total | tr -s ' ' | cut -d' ' -f4"
    echo
done