/proc/net/netstat可讀顯示指令碼
阿新 • • 發佈：2018-11-30
在檢視centos機器的網路狀態時，嚐嚐要看看計數器檔案/proc/net/netstat，但是直接cat，如下顯示
# cat /proc/net/netstat TcpExt: SyncookiesSent SyncookiesRecv SyncookiesFailed EmbryonicRsts PruneCalled RcvPruned OfoPruned OutOfWindowIcmps LockDroppedIcmps ArpFilter TW TWRecycled TWKilled PAWSPassive PAWSActive PAWSEstab DelayedACKs DelayedACKLocked DelayedACKLost ListenOverflows ListenDrops TCPPrequeued TCPDirectCopyFromBacklog TCPDirectCopyFromPrequeue TCPPrequeueDropped TCPHPHits TCPHPHitsToUser TCPPureAcks TCPHPAcks TCPRenoRecovery TCPSackRecovery TCPSACKReneging TCPFACKReorder TCPSACKReorder TCPRenoReorder TCPTSReorder TCPFullUndo TCPPartialUndo TCPDSACKUndo TCPLossUndo TCPLoss TCPLostRetransmit TCPRenoFailures TCPSackFailures TCPLossFailures TCPFastRetrans TCPForwardRetrans TCPSlowStartRetrans TCPLossProbes TCPLossProbeRecovery TCPTimeouts TCPRenoRecoveryFail TCPSackRecoveryFail TCPSchedulerFailed TCPRcvCollapsed TCPDSACKOldSent TCPDSACKOfoSent TCPDSACKRecv TCPDSACKOfoRecv TCPAbortOnData TCPAbortOnClose TCPAbortOnMemory TCPAbortOnTimeout TCPAbortOnLinger TCPAbortFailed TCPMemoryPressures TCPSACKDiscard TCPDSACKIgnoredOld TCPDSACKIgnoredNoUndo TCPSpuriousRTOs TCPMD5NotFound TCPMD5Unexpected TCPSackShifted TCPSackMerged TCPSackShiftFallback TCPBacklogDrop TCPMinTTLDrop TCPChallengeACK TCPSYNChallenge BusyPollRxPackets TCPFromZeroWindowAdv TCPToZeroWindowAdv TCPWantZeroWindowAdv TcpExt: 35040990 0 59779326 3357 0 0 0 0 0 0 136419 18 38840650 31651 0 13 113169939 59662 104607836 423895 423895 177 40880 24 0 1990635022 16 754081894 1653441235 0 1022856 0 0 0 0 0 0 0 1061337 77658894 11069 13354 0 2243 5702 562930 502224 758547 76581738 39694045 232891774 0 138769 0 0 104607836 26 7355145 2287 1196925 559884 0 10981 0 177 0 0 0 285736 0 0 0 0 51088 3908984 4959708 0 563033 704255 0 0 0 6 IpExt: InNoRoutes InTruncatedPkts InMcastPkts OutMcastPkts InBcastPkts OutBcastPkts InOctets OutOctets InMcastOctets OutMcastOctets InBcastOctets OutBcastOctets IpExt: 0 0 0 0 11214 0 673588464378 928920742927 0 0 4316942 0
上面這個太難看懂，有如下awk指令碼，可以格式化
cat /proc/net/netstat | awk '(f==0) {name=$1; i=2; while ( i<=NF) {n[i] = $i; i++ }; f=1; next} (f==1){ i=2; while ( i<=NF){ printf "%s%s = %d\n", name, n[i], $i; i++}; f=0} ' TcpExt:SyncookiesSent = 35489955 TcpExt:SyncookiesRecv = 0 TcpExt:SyncookiesFailed = 60485560 TcpExt:EmbryonicRsts = 3358 TcpExt:PruneCalled = 0 TcpExt:RcvPruned = 0 TcpExt:OfoPruned = 0 TcpExt:OutOfWindowIcmps = 0 TcpExt:LockDroppedIcmps = 0 TcpExt:ArpFilter = 0 TcpExt:TW = 136714 TcpExt:TWRecycled = 18 TcpExt:TWKilled = 39264681 TcpExt:PAWSPassive = 33045 TcpExt:PAWSActive = 0 TcpExt:PAWSEstab = 13 TcpExt:DelayedACKs = 113527324 TcpExt:DelayedACKLocked = 59711 TcpExt:DelayedACKLost = 104743999 TcpExt:ListenOverflows = 427785 TcpExt:ListenDrops = 427785 TcpExt:TCPPrequeued = 177 TcpExt:TCPDirectCopyFromBacklog = 40880 TcpExt:TCPDirectCopyFromPrequeue = 24 TcpExt:TCPPrequeueDropped = 0 TcpExt:TCPHPHits = 1994510135 TcpExt:TCPHPHitsToUser = 16 TcpExt:TCPPureAcks = 761529606 TcpExt:TCPHPAcks = 1653441443 TcpExt:TCPRenoRecovery = 0 TcpExt:TCPSackRecovery = 1062162 TcpExt:TCPSACKReneging = 0 TcpExt:TCPFACKReorder = 0 TcpExt:TCPSACKReorder = 0 TcpExt:TCPRenoReorder = 0 TcpExt:TCPTSReorder = 0 TcpExt:TCPFullUndo = 0 TcpExt:TCPPartialUndo = 0 TcpExt:TCPDSACKUndo = 1061345 TcpExt:TCPLossUndo = 77901187 TcpExt:TCPLoss = 11262 TcpExt:TCPLostRetransmit = 13614 TcpExt:TCPRenoFailures = 0 TcpExt:TCPSackFailures = 2273 TcpExt:TCPLossFailures = 5784 TcpExt:TCPFastRetrans = 588602 TcpExt:TCPForwardRetrans = 516883 TcpExt:TCPSlowStartRetrans = 780842 TcpExt:TCPLossProbes = 76620127 TcpExt:TCPLossProbeRecovery = 39720645 TcpExt:TCPTimeouts = 233315959 TcpExt:TCPRenoRecoveryFail = 0 TcpExt:TCPSackRecoveryFail = 141679 TcpExt:TCPSchedulerFailed = 0 TcpExt:TCPRcvCollapsed = 0 TcpExt:TCPDSACKOldSent = 104743999 TcpExt:TCPDSACKOfoSent = 26 TcpExt:TCPDSACKRecv = 7357048 TcpExt:TCPDSACKOfoRecv = 2324 TcpExt:TCPAbortOnData = 1230601 TcpExt:TCPAbortOnClose = 594171 TcpExt:TCPAbortOnMemory = 0 TcpExt:TCPAbortOnTimeout = 10981 TcpExt:TCPAbortOnLinger = 0 TcpExt:TCPAbortFailed = 177 TcpExt:TCPMemoryPressures = 0 TcpExt:TCPSACKDiscard = 0 TcpExt:TCPDSACKIgnoredOld = 0 TcpExt:TCPDSACKIgnoredNoUndo = 285928 TcpExt:TCPSpuriousRTOs = 0 TcpExt:TCPMD5NotFound = 0 TcpExt:TCPMD5Unexpected = 0 TcpExt:TCPSackShifted = 0 TcpExt:TCPSackMerged = 51985 TcpExt:TCPSackShiftFallback = 3948946 TcpExt:TCPBacklogDrop = 4976826 TcpExt:TCPMinTTLDrop = 0 TcpExt:TCPChallengeACK = 568364 TcpExt:TCPSYNChallenge = 711190 TcpExt:BusyPollRxPackets = 0 TcpExt:TCPFromZeroWindowAdv = 0 TcpExt:TCPToZeroWindowAdv = 0 TcpExt:TCPWantZeroWindowAdv = 6 IpExt:InNoRoutes = 0 IpExt:InTruncatedPkts = 0 IpExt:InMcastPkts = 0 IpExt:OutMcastPkts = 0 IpExt:InBcastPkts = 11214 IpExt:OutBcastPkts = 0 IpExt:InOctets = 675937936252 IpExt:OutOctets = 932078274491 IpExt:InMcastOctets = 0 IpExt:OutMcastOctets = 0 IpExt:InBcastOctets = 4316942 IpExt:OutBcastOctets = 0