LINUX教程：netstat命令详解状态
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《LINUX教程：netstat命令详解状态》要点： netstat 命令用于显示各类网络相关信息,如网络连接,路由表,接口状态 (Interface Statistics),masquerade 连接,多播成员 (Multicast Memberships) 等等 1 常用选项： ? ? -a ：(all)显示所有选项,默认不显示LISTEN相关 ? ? -t ：(tcp)仅显示tcp相关选项 ? ? -u ：(udp)仅显示udp相关选项 ? ? -n ：以数字显示IP和端口,能显示数字的全体转化成数字. ? ? -l ：仅列出有在 Listen (监听) 的服務状态 ? ? -p： 显示建立相关链接的法式名 ? ? -r ：显示路由信息,路由表 ? ? -e ：显示扩大信息,例如uid等 ? ? -s ：按各个协定进行统计 ? ? -c ：每隔一个固准时间,执行该netstat命令. ? ? -w：raw socket相关 2 -tan 显示所有tcp端口 [root@CentOS7 ~]# netstat -ant Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN tcp 0 52 192.168.29.3:22 192.168.29.1:51029 ESTABLISHED tcp 0 0 192.168.29.3:22 192.168.29.1:51180 ESTABLISHED tcp6 0 0 :::111 :::* LISTEN tcp6 0 0 :::22 :::* LISTEN tcp6 0 0 ::1:631 :::* LISTEN tcp6 0 0 ::1:25 :::* 3 显示所有udp端口 -uan [root@centos7 ~]# netstat -anu Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State udp 0 0 0.0.0.0:5353 0.0.0.0:* udp 0 0 0.0.0.0:47414 0.0.0.0:* udp 0 0 192.168.122.1:53 0.0.0.0:* udp 0 0 0.0.0.0:67 0.0.0.0:* 4 显示所有处于监听的tcp端口? ? -tnl [root@centos7 ~]# netstat -tnl Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN tcp 0 0 192.168.122.1:53 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN tcp6 0 0 :::111 :::* LISTEN tcp6 0 0 :::22 :::* LISTEN tcp6 0 0 ::1:631 :::* LISTEN tcp6 0 0 ::1:25 :::* LISTEN 5 显示所有处于监听状态的udp端口 -unl [root@centos7 ~]# netstat -unl Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State udp 0 0 0.0.0.0:5353 0.0.0.0:* udp 0 0 0.0.0.0:47414 0.0.0.0:* udp 0 0 0.0.0.0:20815 0.0.0.0:* udp 0 0 192.168.122.1:53 0.0.0.0:* udp 0 0 0.0.0.0:67 0.0.0.0:* udp 0 0 0.0.0.0:68 0.0.0.0:* udp 0 0 0.0.0.0:68 0.0.0.0:* udp 0 0 0.0.0.0:9804 0.0.0.0:* udp6 0 0 :::12799 :::* udp6 0 0 :::37953 :::* 6 显示路由表 –rn [root@centos7 ~]# netstat -nr Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 0.0.0.0 192.168.29.1 0.0.0.0 UG 0 0 0 ens33 192.168.29.0 0.0.0.0 255.255.255.0 U 0 0 0 ens33 192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0 [root@centos7 ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.29.1 0.0.0.0 UG 100 0 0 ens33 192.168.29.0 0.0.0.0 255.255.255.0 U 100 0 0 ens33 192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0 7 显示每个协定的统计信息 (1)显示所有端口的统计信息 netstat -s [root@centos7 ~]# netstat -s Ip: 3808 total packets received 0 forwarded 0 incoming packets discarded 2444 incoming packets delivered 2254 requests sent out 32 outgoing packets dropped Icmp: 676 ICMP messages received 0 input ICMP message failed. ICMP input histogram: destination unreachable: 148 echo replies: 528 717 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 148 echo request: 569 [……] (2)显示 TCP 端口的统计信息 netstat -st [root@centos7 ~]# netstat -st IcmpMsg: InType0: 528 InType3: 148 OutType3: 148 OutType8: 569 Tcp: 0 active connections openings 2 passive connection openings 0 failed connection attempts 0 connection resets received 2 connections established 1637 segments received 1418 segments send out 0 segments retransmited 0 bad segments received. 0 resets sent (3)显示 UDP 端口的统计信息 netstat -su [root@centos7 ~]# netstat -su IcmpMsg: InType0: 528 InType3: 148 OutType3: 148 OutType8: 569 Udp: 0 packets received 140 packets to unknown port received. 0 packet receive errors 169 packets sent 0 receive buffer errors 0 send buffer errors UdpLite: IpExt: InMcastPkts: 27 OutMcastPkts: 33 InBcastPkts: 766 InOctets: 410294 OutOctets: 432666 InMcastOctets: 4963 OutMcastOctets: 5444 InBcastOctets: 179503 InNoECTPkts: 3848 8 显示 PID 和过程名称 netstat -p [root@centos7 ~]# netstat -p Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 52 centos7.3.local:ssh gateway:51029 ESTABLISHED 1552/sshd: root@pts tcp 0 0 centos7.3.local:ssh gateway:51180 ESTABLISHED 1854/sshd: root@pts Active UNIX domain sockets (w/o servers) Proto RefCnt Flags Type State I-Node PID/Program name Path unix 2 [ ] DGRAM 8520 1/systemd /run/systemd/notify unix 2 [ ] DGRAM 8522 1/systemd /run/systemd/cgroups-agent unix 5 [ ] DGRAM 8542 1/systemd /run/systemd/journal/socket unix 28 [ ] DGRAM 8544 1/systemd /dev/log unix 2 [ ] DGRAM 11419 1/systemd /run/systemd/shutdownd unix 3 [ ] STREAM CONNECTED 23993 1276/ibus-x11 本文永远更新链接地址： 《LINUX教程：netstat命令详解状态》是否对您有启发，欢迎查看更多与《LINUX教程：netstat命令详解状态》相关教程，学精学透。编程之家PHP学院为您提供精彩教程。 （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |