Красивая проверка что именно там в сети опять отвалилось

check_inet.sh

#!/bin/bash

set -euE

SUCCESS="\\033[1;32m"
HEADER="\\033[1;34m"
FAILURE="\\033[1;31m"
NORMAL="\\033[0;39m"

check() {
	echo -ne "$HEADER$2...$NORMAL"
	cmd="ping -w 2 -qc 1 $1"
	[ "$2" = 'ARP' ] && cmd="arping -c 1 -I INET $1"
	if ! $cmd &>/dev/null; then
		echo -e "$FAILURE FAIL $1$NORMAL"
		return 1
	fi
	echo -e "$SUCCESS OK$NORMAL"
	return 0
}

ARP=192.168.0.1
LAN=192.168.0.1
ISP=gate.of.your.provider
WAN=8.8.8.8
DNS=ya.ru
VPN=gate.of.your.vpn

for resource in ARP LAN ISP WAN DNS VPN; do
	check "${!resource}" "$resource"
done

exit 0