小编给大家分享一下Linux中netstat命令怎么用,相信大部分人都还不怎么了解,因此分享这篇文章给大家参考一下,希望大家阅读完这篇文章后大有收获,下面让我们一起去了解一下吧!
LISTEN: 侦听来自远方的TCP端口的连接请求
SYN-SENT: 再发送连接请求后等待匹配的连接请求
SYN-RECEIVED:再收到和发送一个连接请求后等待对方对连接请求的确认
ESTABLISHED: 代表一个打开的连接
FIN-WAIT-1: 等待远程TCP连接中断请求,或先前的连接中断请求的确认
FIN-WAIT-2: 从远程TCP等待连接中断请求
CLOSE-WAIT: 等待从本地用户发来的连接中断请求
CLOSING: 等待远程TCP对连接中断的确认
LAST-ACK: 等待原来的发向远程TCP的连接中断请求的确认
TIME-WAIT: 等待足够的时间以确保远程TCP接收到连接中断请求的确认
CLOSED: 没有任何连接状态
netstat(选项)
-a或–all:显示所有连线中的Socket;
-A<网络类型>或–<网络类型>:列出该网络类型连线中的相关地址;
-c或–continuous:持续列出网络状态;
-C或–cache:显示路由器配置的快取信息;
-e或–extend:显示网络其他相关信息;
-F或–fib:显示FIB;
-g或–groups:显示多重广播功能群组组员名单;
-h或–help:在线帮助;
-i或–interfaces:显示网络界面信息表单;
-l或–listening:显示监控中的服务器的Socket;
-M或–masquerade:显示伪装的网络连线;
-n或–numeric:直接使用ip地址,而不通过域名服务器;
-N或–netlink或–symbolic:显示网络硬件外围设备的符号连接名称;
-o或–timers:显示计时器;
-p或–programs:显示正在使用Socket的程序识别码和程序名称;
-r或–route:显示Routing Table;
-s或–statistice:显示网络工作信息统计表;
-t或–tcp:显示TCP传输协议的连线状况;
-u或–udp:显示UDP传输协议的连线状况;
-v或–verbose:显示指令执行过程;
-V或–version:显示版本信息;
-w或–raw:显示RAW传输协议的连线状况;
-x或–unix:此参数的效果和指定"-A unix"参数相同;
–ip或–inet:此参数的效果和指定"-A inet"参数相同。
> netstat -a
> netstat -at
> netstat -au
> netstat -l
> netstat -lt
> netstat -lu
> netstat -lx
> netstat -s
Ip:
1007495197 total packets received
0 forwarded
582 with unknown protocol
0 incoming packets discarded
1007422115 incoming packets delivered
Icmp:
66583265 ICMP messages received
63899 input ICMP message failed.
InCsumErrors: 384
ICMP input histogram:
destination unreachable: 115410
timeout in transit: 12840
source quenches: 11
redirects: 563
echo requests: 66453453
echo replies: 152
timestamp request: 438
address mask request: 4
66987000 ICMP messages sent
0 ICMP messages failed
ICMP output histogram:
destination unreachable: 533106
echo request: 4
echo replies: 66453453
timestamp replies: 437
IcmpMsg:
InType0: 152
InType3: 115410
InType4: 11
InType5: 563
IpExt:
InNoRoutes: 15
InMcastPkts: 1291307
InOctets: 211446050816
OutOctets: 481070069194
> netstat -st
IcmpMsg:
InType0: 152
InType3: 115410
InType4: 11
InType5: 563
InType8: 66453492
Tcp:
55437641 active connections openings
35899081 passive connection openings
552243 failed connection attempts
753118 connection resets received
7 connections established
UdpLite:
TcpExt:
162052 SYN cookies sent
621 SYN cookies received
4998179 invalid SYN cookies received
551915 resets received for embryonic SYN_RECV sockets
IpExt:
InNoRoutes: 15
InMcastPkts: 1291308
InOctets: 211446303015
OutOctets: 481070459735
InMcastOctets: 46487088
> netstat -su
IcmpMsg:
InType0: 152
InType3: 115410
InType4: 11
InType5: 563
InType8: 66453594
InType11: 12840
InType13: 438
InType17: 4
InType37: 3
InType165: 7
OutType0: 66453594
OutType3: 533106
OutType8: 4
OutType14: 437
Udp:
17941589 packets received
637146 packets to unknown port received.
1649 packet receive errors
17977050 packets sent
0 receive buffer errors
0 send buffer errors
InCsumErrors: 1640
UdpLite:
IpExt:
InNoRoutes: 15
InMcastPkts: 1291310
InOctets: 211446802283
OutOctets: 481071405083
InMcastOctets: 46487160
InNoECTPkts: 1009629627
InECT1Pkts: 9955
InECT0Pkts: 1987096
InCEPkts: 94039
> netstat -pt
> netstat -an
每隔一秒输出网络信息
> netstat -c
> netstat -r
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
default gateway 0.0.0.0 UG 0 0 0 eth0
link-local 0.0.0.0 255.255.0.0 U 0 0 0 eth0
172.16.0.0 0.0.0.0 255.255.240.0 U 0 0 0 eth0
> netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 172.16.0.1 0.0.0.0 UG 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
172.16.0.0 0.0.0.0 255.255.240.0 U 0 0 0 eth0
> netstat -tunlp | grep ssh tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 4400/sshd
> netstat -an | grep ":80"
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 172.16.0.9:80 185.191.171.12:9380 TIME_WAIT
tcp 0 0 172.16.0.9:80 185.191.171.26:52418 TIME_WAIT
tcp 0 3450 172.16.0.9:80 185.191.171.37:25108 FIN_WAIT1
tcp 0 0 172.16.0.9:80 185.191.171.37:55096 TIME_WAIT
tcp 0 0 172.16.0.9:80 144.76.176.171:27832 TIME_WAIT
tcp 0 0 172.16.0.9:80 118.126.124.7:11127 TIME_WAIT
tcp 0 0 172.16.0.9:46628 169.254.0.55:8080 TIME_WAIT
tcp 0 0 172.16.0.9:80 144.76.176.171:23812 ESTABLISHED
> netstat -tunlp | grep 80 | awk '{print $7}' | cut -d/ -f1
21323
> netstat -i
Kernel Interface table
Iface MTU RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
docker0 1500 0 0 0 0 0 0 0 0 BMU
eth0 1450 462305568 0 0 0 276046945 0 0 0 BMRU
lo 65536 7204971 0 0 0 7204971 0 0 0 LRU
vpn_abi 1500 229612389 0 1023383 0 146640133 0 956 0 BMRU
> netstat -n | awk '/^tcp/{++S[$NF]}END{for(i in S) print i,S[i]}'
ESTABLISHED 7
FIN_WAIT2 13
TIME_WAIT 18
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