目录linux的netstat命令1、tcp连接状态详解2、命令格式3、命令选项4、列出所有端口(包含TCP和UDP)4、列出所有TCP端口5、列出所有UDP端口6、列出所有处于监听状态的 Sockets7、只列出所有监
netstat(选项)
> 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: tKlSTL115410
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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