diff --git a/sources/tech/20150416 Linux Network Statistics Tools or Commands.md b/sources/tech/20150416 Linux Network Statistics Tools or Commands.md new file mode 100644 index 0000000000..6ca5294165 --- /dev/null +++ b/sources/tech/20150416 Linux Network Statistics Tools or Commands.md @@ -0,0 +1,355 @@ +Linux Network Statistics Tools / Commands +================================================================================ +How do I find out the current network interface throughput statistics on Linux (CentOS or Debian based distro)? How do I see current kernel snmp counters and network interface statistics on Linux operating systems? + +![](http://s0.cyberciti.org/images/category/old/networking.png) + +You can use any one of the following commands: + +### nstat command : Network Statistics Tool ### + +Type the following command: + + # nstat + +Sample outputs: + + #kernel + IpInReceives 133243 0.0 + IpInDelivers 133243 0.0 + IpOutRequests 92904 0.0 + IcmpOutErrors 97 0.0 + IcmpOutTimeExcds 97 0.0 + IcmpMsgOutType3 97 0.0 + TcpActiveOpens 538 0.0 + TcpEstabResets 56 0.0 + TcpInSegs 129837 0.0 + TcpOutSegs 89720 0.0 + TcpRetransSegs 42 0.0 + TcpOutRsts 704 0.0 + UdpInDatagrams 3255 0.0 + UdpNoPorts 97 0.0 + UdpOutDatagrams 3270 0.0 + Ip6OutNoRoutes 206 0.0 + TcpExtTW 141 0.0 + TcpExtDelayedACKs 508 0.0 + TcpExtDelayedACKLocked 1 0.0 + TcpExtDelayedACKLost 42 0.0 + TcpExtTCPHPHits 117659 0.0 + TcpExtTCPPureAcks 2158 0.0 + TcpExtTCPHPAcks 605 0.0 + TcpExtTCPSackRecovery 1 0.0 + TcpExtTCPLossUndo 16 0.0 + TcpExtTCPSackFailures 4 0.0 + TcpExtTCPFastRetrans 1 0.0 + TcpExtTCPSlowStartRetrans 3 0.0 + TcpExtTCPTimeouts 33 0.0 + TcpExtTCPDSACKOldSent 40 0.0 + TcpExtTCPDSACKRecv 5 0.0 + TcpExtTCPAbortOnData 120 0.0 + TcpExtTCPAbortOnClose 55 0.0 + TcpExtTCPSackShiftFallback 9 0.0 + IpExtInOctets 180131682 0.0 + IpExtOutOctets 7289106 0.0 + +### ss command : Utility To Investigate Sockets ### + +To see summary of stats, enter: + + # ss -s + +Sample outputs: + + Total: 786 (kernel 804) + TCP: 65 (estab 40, closed 7, orphaned 0, synrecv 0, timewait 6/0), ports 56 + Transport Total IP IPv6 + * 804 - - + RAW 1 1 0 + UDP 12 9 3 + TCP 58 52 6 + INET 71 62 9 + FRAG 0 0 0 + +See [ss command tutorial][1] for more information. + +### netstat command : The Old Good Utility To Show Sockets ### + +To see a table of all network interfaces and its summary, enter: + + # netstat -i + +Sample outputs: + + Kernel Interface table + Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg + eth0 1500 0 941022 0 0 0 688165 0 0 0 BMRU + lo 16436 0 9304 0 0 0 9304 0 0 0 LRU + ppp0 1496 0 3784 0 0 0 4177 0 0 0 MOPRU + +To see summary statistics for each protocol, enter: + + # netstat -s + +Sample outputs: + + Ip: + 1092065 total packets received + 0 forwarded + 0 incoming packets discarded + 1091681 incoming packets delivered + 798913 requests sent out + 895 dropped because of missing route + 759 reassemblies required + 375 packets reassembled ok + Icmp: + 17 ICMP messages received + 0 input ICMP message failed. + ICMP input histogram: + timeout in transit: 8 + echo replies: 9 + 1747 ICMP messages sent + 0 ICMP messages failed + ICMP output histogram: + destination unreachable: 1730 + echo request: 17 + IcmpMsg: + InType0: 9 + InType11: 8 + OutType3: 1730 + OutType8: 17 + Tcp: + 4822 active connections openings + 1129 passive connection openings + 457 failed connection attempts + 165 connection resets received + 7 connections established + 1062519 segments received + 771394 segments send out + 7158 segments retransmited + 6 bad segments received. + 2578 resets sent + Udp: + 20846 packets received + 1730 packets to unknown port received. + 0 packet receive errors + 19242 packets sent + UdpLite: + TcpExt: + 71 invalid SYN cookies received + 8 resets received for embryonic SYN_RECV sockets + 142 packets pruned from receive queue because of socket buffer overrun + 2109 TCP sockets finished time wait in fast timer + 84 packets rejects in established connections because of timestamp + 19454 delayed acks sent + 6 delayed acks further delayed because of locked socket + Quick ack mode was activated 7306 times + 1 packets directly queued to recvmsg prequeue. + 1 bytes directly received in process context from prequeue + 823921 packet headers predicted + 24412 acknowledgments not containing data payload received + 10150 predicted acknowledgments + 242 times recovered from packet loss by selective acknowledgements + 33 congestion windows recovered without slow start by DSACK + 335 congestion windows recovered without slow start after partial ack + 336 TCP data loss events + TCPLostRetransmit: 35 + 1 timeouts after reno fast retransmit + 156 timeouts after SACK recovery + 116 timeouts in loss state + 461 fast retransmits + 5 forward retransmits + 608 retransmits in slow start + 2073 other TCP timeouts + 62 SACK retransmits failed + 43074 packets collapsed in receive queue due to low socket buffer + 8499 DSACKs sent for old packets + 101 DSACKs sent for out of order packets + 308 DSACKs received + 9 DSACKs for out of order packets received + 427 connections reset due to unexpected data + 122 connections reset due to early user close + 28 connections aborted due to timeout + TCPDSACKIgnoredOld: 3 + TCPDSACKIgnoredNoUndo: 60 + TCPSpuriousRTOs: 4 + TCPSackShifted: 282 + TCPSackMerged: 740 + TCPSackShiftFallback: 1017 + IpExt: + InMcastPkts: 47 + OutMcastPkts: 51 + InBcastPkts: 1 + InOctets: 1341508973 + OutOctets: 72525352 + InMcastOctets: 8649 + OutMcastOctets: 7519 + InBcastOctets: 328 + +See [netstat command tutorial][2] for more information. + +### ip / ifconfig command : Configure or Show a Network Interface Info ### + +Type the following command: + + # ifconfig + +OR + + # /sbin/ifconfig + +OR + + # ifconfig eth0 + +---------- + + eth0 Link encap:Ethernet HWaddr b8:ac:6f:65:31:e5 + inet addr:192.168.1.5 Bcast:192.168.1.255 Mask:255.255.255.0 + inet6 addr: fe80::baac:6fff:fe65:31e5/64 Scope:Link + UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 + RX packets:966334 errors:0 dropped:0 overruns:0 frame:0 + TX packets:703297 errors:0 dropped:0 overruns:0 carrier:0 + collisions:0 txqueuelen:1000 + RX bytes:1186255648 (1.1 GiB) TX bytes:73968238 (70.5 MiB) + Interrupt:17 + lo Link encap:Local Loopback + inet addr:127.0.0.1 Mask:255.0.0.0 + inet6 addr: ::1/128 Scope:Host + UP LOOPBACK RUNNING MTU:16436 Metric:1 + RX packets:9666 errors:0 dropped:0 overruns:0 frame:0 + TX packets:9666 errors:0 dropped:0 overruns:0 carrier:0 + collisions:0 txqueuelen:0 + RX bytes:1399578 (1.3 MiB) TX bytes:1399578 (1.3 MiB) + ppp0 Link encap:Point-to-Point Protocol + inet addr:10.1.11.70 P-t-P:10.0.31.18 Mask:255.255.255.255 + UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1496 Metric:1 + RX packets:3784 errors:0 dropped:0 overruns:0 frame:0 + TX packets:4177 errors:0 dropped:0 overruns:0 carrier:0 + collisions:0 txqueuelen:3 + RX bytes:2400265 (2.2 MiB) TX bytes:275983 (269.5 KiB) + +To display network interface statistics, enter: + + # ip -s link + +Sample outputs: + + 1: lo: mtu 16436 qdisc noqueue state UNKNOWN + link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 + RX: bytes packets errors dropped overrun mcast + 1444187 9960 0 0 0 0 + TX: bytes packets errors dropped carrier collsns + 1444187 9960 0 0 0 0 + 2: eth0: mtu 1500 qdisc mq state UP qlen 1000 + link/ether b8:ac:6f:65:31:e5 brd ff:ff:ff:ff:ff:ff + RX: bytes packets errors dropped overrun mcast + 1221956483 991501 0 0 0 24 + TX: bytes packets errors dropped carrier collsns + 75623937 720272 0 0 0 0 + 3: wlan0: mtu 1500 qdisc noop state DOWN qlen 1000 + link/ether 00:21:6a:ca:9b:10 brd ff:ff:ff:ff:ff:ff + RX: bytes packets errors dropped overrun mcast + 0 0 0 0 0 0 + TX: bytes packets errors dropped carrier collsns + 0 0 0 0 0 0 + 4: pan0: mtu 1500 qdisc noop state DOWN + link/ether 4a:c7:5f:0e:8e:d8 brd ff:ff:ff:ff:ff:ff + RX: bytes packets errors dropped overrun mcast + 0 0 0 0 0 0 + TX: bytes packets errors dropped carrier collsns + 0 0 0 0 0 0 + 8: ppp0: mtu 1496 qdisc pfifo_fast state UNKNOWN qlen 3 + link/ppp + RX: bytes packets errors dropped overrun mcast + 2419881 3848 0 0 0 0 + TX: bytes packets errors dropped carrier collsns + 284151 4287 0 0 0 0 + +### sar command: Display Network Stats ### + +Type the following command (you need to [install and enable sar via sysstat package][3]): +sar -n DEV + + Linux 2.6.32-220.2.1.el6.x86_64 (www.cyberciti.biz) Tuesday 13 March 2012 _x86_64_ (2 CPU) + 12:00:01 CDT IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s + 12:10:01 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 12:10:01 CDT eth0 127.13 121.32 95.45 18.34 0.00 0.00 0.00 + 12:10:01 CDT eth1 98.48 110.62 16.72 96.33 0.00 0.00 0.00 + 12:20:01 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 12:20:01 CDT eth0 139.95 133.41 106.30 19.95 0.00 0.00 0.00 + 12:20:01 CDT eth1 110.65 121.85 18.14 107.13 0.00 0.00 0.00 + 12:30:01 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 12:30:01 CDT eth0 147.85 132.49 115.78 20.45 0.00 0.00 0.00 + 12:30:01 CDT eth1 111.88 127.39 18.61 117.65 0.00 0.00 0.00 + 12:40:01 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 12:40:01 CDT eth0 136.75 124.64 105.24 19.48 0.00 0.00 0.00 + 12:40:01 CDT eth1 101.65 115.32 17.58 104.50 0.00 0.00 0.00 + 12:50:01 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 12:50:01 CDT eth0 131.45 125.69 96.49 19.58 0.00 0.00 0.00 + 12:50:01 CDT eth1 101.41 111.31 17.54 96.78 0.00 0.00 0.00 + 01:00:01 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 01:00:01 CDT eth0 140.30 133.27 102.17 20.75 0.00 0.00 0.00 + 01:00:01 CDT eth1 106.90 119.51 18.53 103.09 0.00 0.00 0.00 + 01:10:01 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 01:10:01 CDT eth0 152.03 127.74 125.56 19.85 0.00 0.00 0.00 + 01:10:01 CDT eth1 115.60 134.57 18.73 126.96 0.00 0.00 0.00 + 01:20:01 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 01:20:01 CDT eth0 138.55 130.55 103.03 20.20 0.00 0.00 0.00 + .... + .. + .... + .. + . + 01:00:01 CDT eth1 156.82 169.48 28.83 138.49 0.00 0.00 0.00 + 01:10:01 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 01:10:01 CDT eth0 215.19 194.82 163.11 30.99 0.00 0.00 0.00 + 01:10:01 CDT eth1 162.49 183.79 28.36 163.70 0.00 0.00 0.00 + 01:20:01 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 01:20:01 CDT eth0 200.20 192.23 140.64 30.93 0.00 0.00 0.00 + 01:20:01 CDT eth1 153.60 166.96 27.32 140.26 0.00 0.00 0.00 + 01:30:01 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 01:30:01 CDT eth0 111.98 103.58 79.12 16.52 0.00 0.00 0.48 + 01:30:01 CDT eth1 87.50 95.58 14.74 79.35 0.00 0.00 0.00 + Average: IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s + Average: lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + Average: eth0 211.21 196.20 156.18 31.20 0.00 0.00 0.01 + Average: eth1 159.10 174.52 28.00 149.95 0.00 0.00 0.00 + +Or type the following command: + + # sar -n DEV 1 3 + +Sample outputs: + + Linux 2.6.32-220.2.1.el6.x86_64 (www.cyberciti.biz) Tuesday 13 March 2012 _x86_64_ (2 CPU) + 01:44:03 CDT IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s + 01:44:04 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 01:44:04 CDT eth0 161.70 154.26 105.20 26.63 0.00 0.00 0.00 + 01:44:04 CDT eth1 145.74 142.55 25.11 144.94 0.00 0.00 0.00 + 01:44:04 CDT IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s + 01:44:05 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 01:44:05 CDT eth0 162.14 156.31 107.46 42.18 0.00 0.00 0.00 + 01:44:05 CDT eth1 135.92 138.83 39.38 104.92 0.00 0.00 0.00 + 01:44:05 CDT IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s + 01:44:06 CDT lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + 01:44:06 CDT eth0 303.92 293.14 272.91 37.40 0.00 0.00 0.00 + 01:44:06 CDT eth1 252.94 290.20 34.87 263.50 0.00 0.00 0.00 + Average: IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s + Average: lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 + Average: eth0 210.37 202.34 163.19 35.66 0.00 0.00 0.00 + Average: eth1 178.93 191.64 33.36 171.60 0.00 0.00 0.00 + +-------------------------------------------------------------------------------- + +via: http://www.cyberciti.biz/faq/network-statistics-tools-rhel-centos-debian-linux/ + +作者：[nixCraft][a] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出 + +[a]:http://www.cyberciti.biz/tips/about-us +[1]:http://www.cyberciti.biz/tips/linux-investigate-sockets-network-connections.html +[2]:http://www.cyberciti.biz/tips/netstat-command-tutorial-examples.html +[3]:http://www.cyberciti.biz/tips/identifying-linux-bottlenecks-sar-graphs-with-ksar.html \ No newline at end of file