Add nstat.md and updata Readme.md (#632)
* Update README.md * Update README.md * add nstat.md
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[](https://www.jsdelivr.com/package/npm/linux-command)
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[](https://hub.docker.com/r/wcjiang/linux-command)
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当前仓库搜集了 580 多个 Linux 命令，是一个非盈利性的仓库，生成了一个 web 网站方便使用，目前网站没有任何广告，内容包含 Linux 命令手册、详解、学习，内容来自网络和网友的补充，非常值得收藏的 Linux 命令速查手册。版权归属原作者，对任何法律问题及风险不承担任何责任，没有任何商业目的，如果认为侵犯了您的版权，请来信告知。我不能完全保证内容的正确性。通过使用本站内容带来的风险与我无关。当使用本站时，代表您已接受了本站的使用条款和隐私条款。
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当前仓库搜集了 600 多个 Linux 命令，是一个非盈利性的仓库，生成了一个 web 网站方便使用，目前网站没有任何广告，内容包含 Linux 命令手册、详解、学习，内容来自网络和网友的补充，非常值得收藏的 Linux 命令速查手册。版权归属原作者，对任何法律问题及风险不承担任何责任，没有任何商业目的，如果认为侵犯了您的版权，请来信告知。我不能完全保证内容的正确性。通过使用本站内容带来的风险与我无关。当使用本站时，代表您已接受了本站的使用条款和隐私条款。
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## Web 版本
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nstat
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===
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nstat 是一个简单的监视内核的 SNMP 计数器和网络接口状态的实用工具。
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## 补充说明
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大多数命令行用户都熟悉 netstat ，这是 net-tools 软件包中的命令。目前新版本中 net-tools 软件包几乎完全被弃用，取而代之的是 ip 命令套件，而 nstat 属于新软件包。
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### 语法
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```s
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nstat [OPTION] [ PATTERN [ PATTERN ] ]
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```
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### 选项
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```shell
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-h：显示帮助信息；
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-V：显示指令版本信息；
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-z：转储零计数器。默认情况下不显示它们；
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-r：清零历史统计；
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-n：不显示任何内容，仅更新历史；
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-a：显示计数器的绝对值；
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-d：以守护进程模式运行并收集统计数据
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-s：不更新历史；
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-j：JSON格式输出。
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```
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### 实例
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直接输入以查询网络接口状态，以下展示了 IPv4，IPv6，TCP，UDP，ICMP 的统计数据：
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```shell
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nstat
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#kernel
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IpInReceives 769152 0.0
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IpInAddrErrors 1 0.0
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IpInDelivers 769146 0.0
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IpOutRequests 764236 0.0
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IpOutDiscards 20 0.0
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IpOutNoRoutes 1 0.0
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IcmpInMsgs 92 0.0
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IcmpInDestUnreachs 92 0.0
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IcmpOutMsgs 94 0.0
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IcmpOutDestUnreachs 94 0.0
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IcmpMsgInType3 92 0.0
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IcmpMsgOutType3 94 0.0
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TcpActiveOpens 1786 0.0
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TcpPassiveOpens 142 0.0
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TcpAttemptFails 11 0.0
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TcpEstabResets 72 0.0
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TcpInSegs 756827 0.0
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TcpOutSegs 802908 0.0
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TcpRetransSegs 767 0.0
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TcpOutRsts 702 0.0
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UdpInDatagrams 12075 0.0
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UdpNoPorts 82 0.0
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UdpOutDatagrams 7045 0.0
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UdpIgnoredMulti 70 0.0
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Ip6InReceives 5005 0.0
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Ip6InDelivers 5005 0.0
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Ip6OutRequests 131 0.0
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Ip6OutDiscards 2 0.0
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Ip6OutNoRoutes 959 0.0
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Ip6InMcastPkts 4999 0.0
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Ip6OutMcastPkts 125 0.0
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Ip6InOctets 797462 0.0
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Ip6OutOctets 16421 0.0
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Ip6InMcastOctets 797030 0.0
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Ip6OutMcastOctets 15949 0.0
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Ip6InNoECTPkts 5005 0.0
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Icmp6InMsgs 3 0.0
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Icmp6OutMsgs 51 0.0
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Icmp6InNeighborAdvertisements 1 0.0
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Icmp6InMLDv2Reports 2 0.0
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Icmp6OutRouterSolicits 11 0.0
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Icmp6OutNeighborSolicits 4 0.0
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Icmp6OutMLDv2Reports 36 0.0
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Icmp6InType136 1 0.0
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Icmp6InType143 2 0.0
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Icmp6OutType133 11 0.0
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Icmp6OutType135 4 0.0
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Icmp6OutType143 36 0.0
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Udp6InDatagrams 4998 0.0
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Udp6OutDatagrams 76 0.0
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TcpExtTW 385 0.0
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TcpExtPAWSEstab 1 0.0
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TcpExtDelayedACKs 37133 0.0
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TcpExtDelayedACKLocked 57 0.0
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TcpExtDelayedACKLost 456 0.0
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TcpExtTCPHPHits 417717 0.0
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TcpExtTCPPureAcks 34186 0.0
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TcpExtTCPHPAcks 222980 0.0
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TcpExtTCPSACKReorder 1 0.0
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TcpExtTCPLossUndo 194 0.0
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TcpExtTCPLostRetransmit 169 0.0
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TcpExtTCPSlowStartRetrans 1 0.0
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TcpExtTCPTimeouts 494 0.0
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TcpExtTCPLossProbes 309 0.0
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TcpExtTCPBacklogCoalesce 571 0.0
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TcpExtTCPDSACKOldSent 281 0.0
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TcpExtTCPDSACKRecv 281 0.0
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TcpExtTCPAbortOnData 13 0.0
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TcpExtTCPAbortOnClose 30 0.0
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TcpExtTCPDSACKIgnoredOld 1 0.0
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TcpExtTCPDSACKIgnoredNoUndo 258 0.0
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TcpExtTCPSackShiftFallback 1 0.0
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TcpExtTCPRcvCoalesce 18314 0.0
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TcpExtTCPFastOpenActiveFail 2 0.0
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TcpExtTCPSpuriousRtxHostQueues 11 0.0
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TcpExtTCPAutoCorking 1684 0.0
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TcpExtTCPFromZeroWindowAdv 2 0.0
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TcpExtTCPToZeroWindowAdv 2 0.0
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TcpExtTCPSynRetrans 479 0.0
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TcpExtTCPOrigDataSent 359814 0.0
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TcpExtTCPHystartTrainDetect 13 0.0
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TcpExtTCPHystartTrainCwnd 550 0.0
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TcpExtTCPKeepAlive 18 0.0
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TcpExtTCPDelivered 361695 0.0
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TcpExtTCPZeroWindowDrop 1 0.0
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TcpExtTcpTimeoutRehash 494 0.0
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TcpExtTcpDuplicateDataRehash 2 0.0
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TcpExtTCPDSACKRecvSegs 281 0.0
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IpExtInNoRoutes 3 0.0
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IpExtInMcastPkts 5392 0.0
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IpExtOutMcastPkts 221 0.0
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IpExtInBcastPkts 70 0.0
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IpExtOutBcastPkts 10 0.0
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IpExtInOctets 2100280442 0.0
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IpExtOutOctets 226760631 0.0
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IpExtInMcastOctets 746608 0.0
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IpExtOutMcastOctets 27565 0.0
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IpExtInBcastOctets 5674 0.0
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IpExtOutBcastOctets 778 0.0
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IpExtInNoECTPkts 1885871 0.0
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```
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