# Created on savesnippets.com · https://savesnippets.com/PCzNhAtGQCnGLV
HOSTS=(web1 web2 web3 db1 db2)
CMD="uptime && df -h /"

declare -A status
for h in "${HOSTS[@]}"; do
    echo "──── $h ────"
    if ssh -n -o ConnectTimeout=5 -o BatchMode=yes "$h" "$CMD"; then
        status[$h]="OK"
    else
        status[$h]="FAIL"
    fi
done

echo
echo "──── Summary ────"
for h in "${HOSTS[@]}"; do
    case "${status[$h]}" in
        OK)   printf '\e[32m✓\e[0m %s\n' "$h" ;;
        FAIL) printf '\e[31m✗\e[0m %s\n' "$h" ;;
    esac
done