shell脚本编程，生成TCP活动状况报告

netstat --statistics --tcp命令可以列出tcp统计信息。编写shell脚本程序，每隔1分钟生成1行信息：当前时间；这一分钟内TCP发送了多少报文；接收了多少报文；收发报文总数；行尾给出符号+或-或空格（+表示这分钟收发报文数比上分钟多，收发报文数相同用空格，否则用符号-）

-Shell scr ipting, TCP activity report generation



The netstat--statistics--tcp command to list the TCP statistics. Shell program, every 1 minutes to generate 1 rows of information: the current time　this one minute TCP sent many messages received many messages　messages　the total number of line　given the sign+ or- or spaces (+ said this minute packet number more than minutes, receiving and sending the same number with a space, or symbol)