定时显示与特定主机的连接

netstatWatch.sh

#! /bin/bash

r_host='10.11.1.100'

if  [ -f '/usr/bin/watch' ]
then
        watch -n 1 -d "netstat -an | grep $r_host"
else
        while [ 1 ] 
        do
                netstat -an | grep $r_host
                sleep 1
                clear
        done
fi