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linux端口查询命令

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  Linux系统需要了解端口占用情况的时候我们可以通过netstat命令来查看,下面由学习啦小编为大家整理了linux的端口查询命令的相关知识,希望对大家有帮助!

  linux的端口查询命令详解

  在Linux使用过程中,需要了解当前系统开放了哪些端口,并且要查看开放这些端口的具体进程和用户,可以通过netstat命令进行简单查询

  netstat命令各个参数说明如下:

  -t : 指明显示TCP端口

  -u : 指明显示UDP端口

  -l : 仅显示监听套接字(所谓套接字就是使应用程序能够读写与收发通讯协议(protocol)与资料的程序)

  -p : 显示进程标识符和程序名称,每一个套接字/端口都属于一个程序。

  -n : 不进行DNS轮询,显示IP(可以加速操作)

  即可显示当前服务器上所有端口及进程服务,于grep结合可查看某个具体端口及服务情况··

  netstat -ntlp //查看当前所有tcp端口·

  netstat -ntulp |grep 80 //查看所有80端口使用情况·

  netstat -an | grep 3306 //查看所有3306端口使用情况·

  linux端口查询命令实例

  显示详细的网络状况

  # netstat -a

  显示当前户籍UDP连接状况

  # netstat -nu

  显示UDP端口号的使用情况

  # netstat -apu

  Active Internet connections (servers and established)

  Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name

  udp 0 0 *:32768 *:* -

  udp 0 0 *:nfs *:* -

  udp 0 0 *:641 *:* 3006/rpc.statd

  udp 0 0 192.168.0.3:netbios-ns *:* 3537/nmbd

  udp 0 0 *:netbios-ns *:* 3537/nmbd

  udp 0 0 192.168.0.3:netbios-dgm *:* 3537/nmbd

  udp 0 0 *:netbios-dgm *:* 3537/nmbd

  udp 0 0 *:tftp *:* 3346/xinetd

  udp 0 0 *:999 *:* 3366/rpc.rquotad

  udp 0 0 *:sunrpc *:* 2986/portmap

  udp 0 0 *:ipp *:* 6938/cupsd

  udp 0 0 *:1022 *:* 3392/rpc.mountd

  udp 0 0 *:638 *:* 3006/rpc.statd

  显示网卡列表

  # 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 1500 0 181864 0 0 0 141278 0 0 0 BMRU

  lo 16436 0 3362 0 0 0 3362 0 0 0 LRU

  显示组播组的关系

  # netstat -g

  IPv6/IPv4 Group Memberships

  Interface RefCnt Group

  --------------- ------ ---------------------

  lo 1 ALL-SYSTEMS.MCAST.NET

  eth0 1 ALL-SYSTEMS.MCAST.NET

  lo 1 ff02::1

  eth0 1 ff02::1:ff0a:b0c

  eth0 1 ff02::1

  显示网络统计信息

  # netstat -s

  Ip:

  184695 total packets received

  0 forwarded

  0 incoming packets discarded

  184687 incoming packets delivered

  143917 requests sent out

  32 outgoing packets dropped

  30 dropped because of missing route

  Icmp:

  676 ICMP messages received

  5 input ICMP message failed.

  ICMP input histogram:

  destination unreachable: 44

  echo requests: 287

  echo replies: 345

  304 ICMP messages sent

  0 ICMP messages failed

  ICMP output histogram:

  destination unreachable: 17

  echo replies: 287

  Tcp:

  473 active connections openings

  28 passive connection openings

  4 failed connection attempts

  11 connection resets received

  1 connections established

  178253 segments received

  137936 segments send out

  29 segments retransmited

  0 bad segments received.

  336 resets sent

  Udp:

  5714 packets received

  8 packets to unknown port received.

  0 packet receive errors

  5419 packets sent

  TcpExt:

  1 resets received for embryonic SYN_RECV sockets

  ArpFilter: 0

  12 TCP sockets finished time wait in fast timer

  572 delayed acks sent

  3 delayed acks further delayed because of locked socket

  13766 packets directly queued to recvmsg prequeue.

  1101482 packets directly received from backlog

  19599861 packets directly received from prequeue

  46860 packets header predicted

  14541 packets header predicted and directly queued to user

  TCPPureAcks: 12259

  TCPHPAcks: 9119

  TCPRenoRecovery: 0

  TCPSackRecovery: 0

  TCPSACKReneging: 0

  TCPFACKReorder: 0

  TCPSACKReorder: 0

  TCPRenoReorder: 0

  TCPTSReorder: 0

  TCPFullUndo: 0

  TCPPartialUndo: 0

  TCPDSACKUndo: 0

  TCPLossUndo: 0

  TCPLoss: 0

  TCPLostRetransmit: 0

  TCPRenoFailures: 0

  TCPSackFailures: 0

  TCPLossFailures: 0

  TCPFastRetrans: 0

  TCPForwardRetrans: 0

  TCPSlowStartRetrans: 0

  TCPTimeouts: 29

  TCPRenoRecoveryFail: 0

  TCPSackRecoveryFail: 0

  TCPSchedulerFailed: 0

  TCPRcvCollapsed: 0

  TCPDSACKOldSent: 0

  TCPDSACKOfoSent: 0

  TCPDSACKRecv: 0

  TCPDSACKOfoRecv: 0

  TCPAbortOnSyn: 0

  TCPAbortOnData: 1

  TCPAbortOnClose: 0

  TCPAbortOnMemory: 0

  TCPAbortOnTimeout: 3

  TCPAbortOnLinger: 0

  TCPAbortFailed: 3

  TCPMemoryPressures: 0

  显示监听的套接口

  # netstat -l

  Active Internet connections (only servers)

  Proto Recv-Q Send-Q Local Address Foreign Address State

  tcp 0 0 *:32769 *:* LISTEN

  tcp 0 0 *:nfs *:* LISTEN

  tcp 0 0 *:644 *:* LISTEN

  tcp 0 0 *:1002 *:* LISTEN

  tcp 0 0 *:netbios-ssn *:* LISTEN

  tcp 0 0 *:sunrpc *:* LISTEN

  tcp 0 0 vm-dev:ipp *:* LISTEN

  tcp 0 0 *:telnet *:* LISTEN

  tcp 0 0 *:601 *:* LISTEN

  tcp 0 0 *:microsoft-ds *:* LISTEN

  tcp 0 0 *:http *:* LISTEN

  tcp 0 0 *:ssh *:* LISTEN

  tcp 0 0 *:https *:* LISTEN

  udp 0 0 *:32768 *:*

  udp 0 0 *:nfs *:*

  udp 0 0 *:641 *:*

  udp 0 0 192.168.0.3:netbios-ns *:*

  udp 0 0 *:netbios-ns *:*

  udp 0 0 192.168.0.3:netbios-dgm *:*

  udp 0 0 *:netbios-dgm *:*

  udp 0 0 *:tftp *:*

  udp 0 0 *:999 *:*

  udp 0 0 *:sunrpc *:*

  udp 0 0 *:ipp *:*

  udp 0 0 *:1022 *:*

  udp 0 0 *:638 *:*

  Active UNIX domain sockets (only servers)

  Proto RefCnt Flags Type State I-Node Path

  unix 2 [ ACC ] STREAM LISTENING 10621 @/tmp/fam-root-

  unix 2 [ ACC ] STREAM LISTENING 7096 /var/run/acpid.socket

  unix 2 [ ACC ] STREAM LISTENING 9792 /tmp/.gdm_socket

  unix 2 [ ACC ] STREAM LISTENING 9927 /tmp/.X11-unix/X0

  unix 2 [ ACC ] STREAM LISTENING 10489 /tmp/ssh-lbUnUf4552/agent.4552

  unix 2 [ ACC ] STREAM LISTENING 10558 /tmp/ksocket-root/kdeinit__0

  unix 2 [ ACC ] STREAM LISTENING 10560 /tmp/ksocket-root/kdeinit-:0

  unix 2 [ ACC ] STREAM LISTENING 10570 /tmp/.ICE-unix/dcop4664-1270815442

  unix 2 [ ACC ] STREAM LISTENING 10843 /tmp/.ICE-unix/4735

  unix 2 [ ACC ] STREAM LISTENING 10591 /tmp/ksocket-root/klauncherah3arc.slave-socket

  unix 2 [ ACC ] STREAM LISTENING 7763 /var/run/iiim/.iiimp-unix/9010

  unix 2 [ ACC ] STREAM LISTENING 11047 /tmp/orbit-root/linc-1291-0-1e92c8082411

  unix 2 [ ACC ] STREAM LISTENING 11053 /tmp/orbit-root/linc-128e-0-dc070659cbb3

  unix 2 [ ACC ] STREAM LISTENING 8020 /var/run/dbus/system_bus_socket

  unix 2 [ ACC ] STREAM LISTENING 58927 /tmp/mcop-root/vm-dev-2c28-4beba75f

  unix 2 [ ACC ] STREAM LISTENING 7860 /tmp/.font-unix/fs7100

  unix 2 [ ACC ] STREAM LISTENING 7658 /dev/gpmctl

  unix 2 [ ACC ] STREAM LISTENING 10498 @/tmp/dbus-s2MLJGO5Ci

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