Linux中netstat命令操作实例汇总(4)

　　代码如下：

　　［root@localhost ~］# netstat -s

　　Ip：

　　530999 total packets received

　　0 forwarded

　　0 incoming packets discarded

　　530999 incoming packets delivered

　　8258 requests sent out

　　1 dropped because of missing route

　　Icmp：

　　90 ICMP messages received

　　0 input ICMP message failed.

　　ICMP input histogram：

　　destination unreachable： 17

　　echo requests： 1

　　echo replies： 72

　　106 ICMP messages sent

　　0 ICMP messages failed

　　ICMP output histogram：

　　destination unreachable： 8

　　echo request： 97

　　echo replies： 1

　　IcmpMsg：

　　InType0： 72

　　InType3： 17

　　InType8： 1

　　OutType0： 1

　　OutType3： 8

　　OutType8： 97

　　Tcp：

　　8 active connections openings

　　15 passive connection openings

　　8 failed connection attempts

　　3 connection resets received

　　1 connections established

　　3132 segments received

　　2617 segments send out

　　53 segments retransmited

　　0 bad segments received.

　　252 resets sent

　　Udp：

　　0 packets received

　　0 packets to unknown port received.

　　0 packet receive errors

　　5482 packets sent

　　TcpExt：

　　1 invalid SYN cookies received

　　1 TCP sockets finished time wait in fast timer

　　57 delayed acks sent

　　Quick ack mode was activated 50 times

　　60 packets directly queued to recvmsg prequeue.

　　68 packets directly received from backlog

　　4399 packets directly received from prequeue

　　520 packets header predicted

　　51 packets header predicted and directly queued to user

　　1194 acknowledgments not containing data received

　　21 predicted acknowledgments

　　0 TCP data loss events

　　1 timeouts after reno fast retransmit

　　9 retransmits in slow start

　　42 other TCP timeouts

　　3 connections aborted due to timeout

　　IpExt：

　　InBcastPkts： 527777

　　说明：

　　按照各个协议分别显示其统计数据。如果我们的应用程序（如Web浏览器）运行速度比较慢，或者不能显示Web页之类的数据，那么我们就可以用本选项来查看一下所显示的信息。我们需要仔细查看统计数据的各行，找到出错的关键字，进而确定问题所在。

　　实例8：显示监听的套接口

　　命令：netstat -l