awk '{	
	if ($5 ~ /3306$/ && $6 == "ESTABLISHED") {
		print($5)
	}
}' nowcoder.txt | awk -F ':' '{
	map[$1] += 1
}
END {
	for (key in map) {
		print(map[key], key)
	}
}' | sort -nk1 -r