Shulou(Shulou.com)06/01 Report--

This article mainly explains "what commands are there to view the data information of the network interface under the Linux system?" interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Next let the editor to take you to learn "what are the commands for viewing network interface data information under the Linux system"?

There are many tools or commands for monitoring network interface TCP status information data. Here are some examples:

Nstat command

The code is as follows:

# nstat

# kernel

IpInReceives 9733104 0.0

IpInDelivers 9733102 0.0

IpOutRequests 9058593 0.0

IcmpInErrors 2147 0.0

IcmpInCsumErrors 1143 0.0

IcmpInDestUnreachs 2 0.0

IcmpInTimeExcds 1361 0.0

IcmpInParmProbs 56 0.0

IcmpInRedirects 1 0.0

IcmpInEchoReps 701 0.0

IcmpInTimestamps 26 0.0

IcmpOutErrors 750 0.0

IcmpOutTimeExcds 23 0.0

IcmpOutEchoReps 26 0.0

IcmpOutTimestamps 701 0.0

IcmpMsgInType0 26 0.0

IcmpMsgInType3 1361 0.0

IcmpMsgInType4 1 0.0

IcmpMsgInType8 701 0.0

IcmpMsgInType11 56 0.0

IcmpMsgOutType0 701 0.0

IcmpMsgOutType3 23 0.0

IcmpMsgOutType8 26 0.0

TcpActiveOpens 678940 0.0

TcpPassiveOpens 910289 0.0

TcpAttemptFails 58018 0.0

TcpEstabResets 14608 0.0

TcpInSegs 9686518 0.0

TcpOutSegs 9038288 0.0

TcpRetransSegs 6700 0.0

TcpInErrs 47 0.0

TcpOutRsts 67249 0.0

UdpInDatagrams 44409 0.0

UdpNoPorts 23 0.0

UdpOutDatagrams 44441 0.0

Ip6InReceives 6 0.0

Ip6InNoRoutes 6 0.0

Ip6OutRequests 9 0.0

Ip6OutNoRoutes 3948 0.0

Ip6OutMcastPkts 14 0.0

Ip6InOctets 432 0.0

Ip6OutOctets 612 0.0

Ip6OutMcastOctets 992 0.0

Ip6InNoECTPkts 6 0.0

Icmp6OutMsgs 9 0.0

Icmp6OutRouterSolicits 3 0.0

Icmp6OutNeighborSolicits 1 0.0

Icmp6OutMLDv2Reports 5 0.0

Icmp6OutType133 3 0.0

Icmp6OutType135 1 0.0

Icmp6OutType143 5 0.0

TcpExtSyncookiesFailed 140 0.0

TcpExtEmbryonicRsts 704 0.0

TcpExtPruneCalled 23 0.0

TcpExtTW 615681 0.0

TcpExtPAWSEstab 20 0.0

TcpExtDelayedACKs 52123 0.0

TcpExtDelayedACKLocked 44 0.0

TcpExtDelayedACKLost 1518 0.0

TcpExtListenDrops 32 0.0

TcpExtTCPPrequeued 19258 0.0

TcpExtTCPDirectCopyFromBacklog 45185 0.0

TcpExtTCPDirectCopyFromPrequeue 394312 0.0

TcpExtTCPHPHits 943072 0.0

TcpExtTCPHPHitsToUser 3478 0.0

TcpExtTCPPureAcks 3242625 0.0

TcpExtTCPHPAcks 547259 0.0

TcpExtTCPSackRecovery 650 0.0

TcpExtTCPFACKReorder 1 0.0

TcpExtTCPSACKReorder 8 0.0

TcpExtTCPTSReorder 23 0.0

TcpExtTCPFullUndo 1 0.0

TcpExtTCPPartialUndo 23 0.0

TcpExtTCPDSACKUndo 1 0.0

TcpExtTCPLossUndo 854 0.0

TcpExtTCPLostRetransmit 162 0.0

TcpExtTCPSackFailures 135 0.0

TcpExtTCPLossFailures 18 0.0

TcpExtTCPFastRetrans 1517 0.0

TcpExtTCPForwardRetrans 104 0.0

TcpExtTCPSlowStartRetrans 172 0.0

TcpExtTCPTimeouts 2764 0.0

TcpExtTCPLossProbes 5201 0.0

TcpExtTCPLossProbeRecovery 2858 0.0

TcpExtTCPSackRecoveryFail 74 0.0

TcpExtTCPRcvCollapsed 460 0.0

TcpExtTCPDSACKOldSent 1645 0.0

TcpExtTCPDSACKOfoSent 21 0.0

TcpExtTCPDSACKRecv 879 0.0

TcpExtTCPAbortOnData 4314 0.0

TcpExtTCPAbortOnClose 346 0.0

TcpExtTCPAbortOnTimeout 186 0.0

TcpExtTCPDSACKIgnoredNoUndo 615 0.0

TcpExtTCPSpuriousRTOs 95 0.0

TcpExtTCPSackShifted 402 0.0

TcpExtTCPSackMerged 2048 0.0

TcpExtTCPSackShiftFallback 2592 0.0

TcpExtTCPRcvCoalesce 145162 0.0

TcpExtTCPOFOQueue 36672 0.0

TcpExtTCPOFOMerge 21 0.0

TcpExtTCPChallengeACK 329 0.0

TcpExtTCPSYNChallenge 47 0.0

IpExtInNoRoutes 2 0.0

IpExtInOctets 1568628267 0.0

IpExtOutOctets 1158526375 0.0

IpExtInNoECTPkts 9828130 0.0

IpExtInECT0Pkts 10 0.0

IpExtInCEPkts 3 0.0

Ss command

The code is as follows:

# ss-s

Total: 319 (kernel 752)

TCP: 187( estab 114,58, orphaned 0, synrecv 0, timewait 58max 0), ports 0

Transport Total IP IPv6

* 752--

RAW 0 0 0

UDP 3 2 1

TCP 129 113 16

INET 132 115 17

FRAG 0 0 0

Netstat command

The code is as follows:

# netstat-I

Kernel Interface table

Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg

Eth0 9001 0 2194916 00 0 1424609 00 0 BMRU

Lo 65536 0 7670598 0 0 0 7670598 0 0 0 LRU

# netstat-s

Ip:

9743496 total packets received

0 forwarded

0 incoming packets discarded

9743494 incoming packets delivered

9068146 requests sent out

Icmp:

2147 ICMP messages received

1143 input ICMP message failed.

InCsumErrors: 2

ICMP input histogram:

Destination unreachable: 1361

Timeout in transit: 56

Source quenches: 1

Echo requests: 701

Echo replies: 26

750 ICMP messages sent

0 ICMP messages failed

ICMP output histogram:

Destination unreachable: 23

Echo request: 26

Echo replies: 701

IcmpMsg:

InType0: 26

InType3: 1361

InType4: 1

InType8: 701

InType11: 56

OutType0: 701

OutType3: 23

OutType8: 26

Tcp:

679665 active connections openings

911387 passive connection openings

58018 failed connection attempts

14608 connection resets received

118 connections established

9696894 segments received

9047825 segments send out

6700 segments retransmited

47 bad segments received.

67249 resets sent

Udp:

44425 packets received

23 packets to unknown port received.

0 packet receive errors

44457 packets sent

UdpLite:

TcpExt:

140 invalid SYN cookies received

704 resets received for embryonic SYN_RECV sockets

23 packets pruned from receive queue because of socket buffer overrun

616402 TCP sockets finished time wait in fast timer

20 packets rejects in established connections because of timestamp

52124 delayed acks sent

45 delayed acks further delayed because of locked socket

Quick ack mode was activated 1519 times

32 SYNs to LISTEN sockets dropped

19258 packets directly queued to recvmsg prequeue.

45185 bytes directly in process context from backlog

394312 bytes directly received in process context from prequeue

943942 packet headers predicted

3478 packets header predicted and directly queued to user

3246338 acknowledgments not containing data payload received

547737 predicted acknowledgments

650 times recovered from packet loss by selective acknowledgements

Detected reordering 1 times using FACK

Detected reordering 8 times using SACK

Detected reordering 23 times using time stamp

1 congestion windows fully recovered without slow start

23 congestion windows partially recovered using Hoe heuristic

1 congestion windows recovered without slow start by DSACK

854 congestion windows recovered without slow start after partial ack

TCPLostRetransmit: 162

135 timeouts after SACK recovery

18 timeouts in loss state

1517 fast retransmits

104 forward retransmits

172 retransmits in slow start

2764 other TCP timeouts

TCPLossProbes: 5202

TCPLossProbeRecovery: 2859

74 SACK retransmits failed

460 packets collapsed in receive queue due to low socket buffer

1646 DSACKs sent for old packets

21 DSACKs sent for out of order packets

879 DSACKs received

4314 connections reset due to unexpected data

346 connections reset due to early user close

186 connections aborted due to timeout

TCPDSACKIgnoredNoUndo: 615

TCPSpuriousRTOs: 95

TCPSackShifted: 402

TCPSackMerged: 2048

TCPSackShiftFallback: 2592

TCPRcvCoalesce: 145187

TCPOFOQueue: 36673

TCPOFOMerge: 21

TCPChallengeACK: 329

TCPSYNChallenge: 47

IpExt:

InNoRoutes: 2

InOctets: 1570012766

OutOctets: 1159491497

InNoECTPkts: 9838700

InECT0Pkts: 10

InCEPkts: 3

Ip command

The code is as follows:

# ip-s link

1: lo: mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default

Link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

RX: bytes packets errors dropped overrun mcast

883395575 7672258 0 0 0

TX: bytes packets errors dropped carrier collsns

883395575 7672258 0 0 0

2: eth0: mtu 9001 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000

Link/ether 02:7a:7d:d2:f7:21 brd ff:ff:ff:ff:ff:ff

RX: bytes packets errors dropped overrun mcast

694754381 2197268 0 0 0

TX: bytes packets errors dropped carrier collsns

296980409 1425257 0 0 0

Sar command

The code is as follows:

# sar-n DEV 1

Linux 3.13.0-48-generic (beta) 17 August 2015 _ x86 CPU 644)

14:46:54 IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s ifutil

14:46:55 eth0 12.00 5.00 0.97 1.18 0.00 0.00 0.00

14:46:55 lo 10.00 10.00 1.00 1.00 0.00 0.00 0.00

14:46:55 IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s ifutil

14:46:56 eth0 1.00 1.00 0.05 0.47 0.00 0.00 0.00

14:46:56 lo 16.00 16.00 2.17 2.17 0.00 0.00 0.00

14:46:56 IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s ifutil

14:46:57 eth0 5.00 3.00 0.26 0.61 0.00 0.00 0.00

14:46:57 lo 10.00 10.00 1.00 1.00 0.00 0.00 0.00

There are other tools such as nload,iftop, etc., which are not listed one by one.

At this point, I believe you have a deeper understanding of "what are the commands for viewing network interface data information under the Linux system?" you might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.