详细说明linux查看TCP连接IP统计小程序代码

#!/usr/bin/env python#coding:utf8import commandsimport timeimport sysdef main(count_list):    print "数量\t\tIP地址 \t\t\t连接状态"
    for i in  count_list:        for x in i.split():            if len(x) > 14:                print "%s \t"% x,            else:                print "%s \t\t" % x,        printif __name__ == '__main__':    if len(sys.argv) >1:        try:            while 1:
                command_str = """netstat -tan    grep '""" + sys.argv[1] + """'   awk '{print $(NF-1),$NF}'    grep -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'    awk -F [\ :] '{print $(NF-2),$NF}'    awk '{ip[$0]++}END{for ( i in ip) print ip[i],i    "sort -nr    head -n 20" }' 2>/dev/null """
                count_list =  commands.getstatusoutput(command_str)[1].split("\n")
                main(count_list)
                time.sleep(5)                print
                print "-----------------------------------------------------"
        except:            pass

    else:        try:            while 1:
                command_str = """netstat -tan  awk '{print $(NF-1),$NF}'    grep -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'    awk -F [\ :] '{print $(NF-2),$NF}'    awk '{ip[$0]++}END{for ( i in ip) print ip[i],i    "sort -nr    head -n 20" }' 2>/dev/null """
                count_list =  commands.getstatusoutput(command_str)[1].split("\n")
                main(count_list)
                time.sleep(5)                print
                print "-----------------------------------------------------"
        except:            pass