Prints rx/tx statistics of all active networks in a human-readable format.

network-statistics.fish

#!/usr/bin/fish
for connection in /sys/class/net/*
	switch '$connection'
		case '*lo'
			continue
		case '*'
			if test (cat $connection/operstate) = 'up'
				set net (basename $connection)
				set rx (math (cat $connection/statistics/rx_bytes) / 1048576)
				set tx (math (cat $connection/statistics/tx_bytes) / 1048576)
				echo "$net D: $rx MiB U: $tx MiB"
				set -e net; set -e rx; set -e tx
			end
	end
end