#!/bin/bash
if [ $# -ne 1 ];then
echo "Follow the one script name , one argument"
fi
case $1 in
LISTEN)
netstat -n | awk ‘/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}‘ | grep $1 | awk ‘{print $2}‘
;;
SYN_RECV)
netstat -n | awk ‘/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}‘ | grep $1 | awk ‘{print $2}‘
;;
SYN_SENT)
netstat -n | awk ‘/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}‘ | grep $1 | awk ‘{print $2}‘
;;
ESTABLISHED)
netstat -n | awk ‘/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}‘ | grep $1 | awk ‘{print $2}‘
;;
FIN_WAIT1)
netstat -n | awk ‘/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}‘ | grep $1 | awk ‘{print $2}‘
;;
FIN_WAIT2)
netstat -n | awk ‘/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}‘ | grep $1 | awk ‘{print $2}‘
;;
CLOSING)
netstat -n | awk ‘/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}‘ | grep $1 | awk ‘{print $2}‘
;;
TIME_WAIT)
netstat -n | awk ‘/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}‘ | grep $1 | awk ‘{print $2}‘
;;
*)
echo -e "\e[033mUsage: sh $0 [LISTEN|SYN_RECV|SYN_SENT|ESTABLISHED|FIN_WAIT1|FIN_WAIT2|CLOSING]\e[0m"
esac原文：https://blog.51cto.com/keep11/2718500