简介
Netstat 命令用于显示各种网络相关信息，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。
输出信息含义
执行netstat后，其输出结果为
[root@localhost net]# netstat
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 52 localhost.localdoma:ssh 192.168.1.120:56520 ESTABLISHED
Active UNIX domain sockets (w/o servers)
Proto RefCnt Flags Type State I-Node Path
unix 2 [ ] DGRAM 8805 /run/systemd/notify
unix 2 [ ] DGRAM 8807 /run/systemd/cgroups-agent
unix 5 [ ] DGRAM 8825 /run/systemd/journal/socket
从整体上看，netstat的输出结果可以分为两个部分：
一个是Active Internet connections，称为有源TCP连接，其中"Recv-Q"和"Send-Q"指的是接收队列和发送队列。这些数字一般都应该是0。如果不是则表示软件包正在队列中堆积。这种情况只能在非常少的情况见到。
另一个是Active UNIX domain sockets，称为有源Unix域套接口(和网络套接字一样，但是只能用于本机通信，性能可以提高一倍)。
Proto显示连接使用的协议,RefCnt表示连接到本套接口上的进程号,Types显示套接口的类型,State显示套接口当前的状态,Path表示连接到套接口的其它进程使用的路径名。
常见参数
-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 拒绝显示别名，能显示数字的全部转化成数字。
-l 仅列出有在 Listen (监听) 的服務状态
-p 显示建立相关链接的程序名
-r 显示路由信息，路由表
-e 显示扩展信息，例如uid等
-s 按各个协议进行统计
-c 每隔一个固定时间，执行该netstat命令。
提示：LISTEN和LISTENING的状态只有用-a或者-l才能看到
实用命令实例
1. 列出所有端口 (包括监听和未监听的)
[root@localhost net]# netstat -a
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN
tcp 0 0 localhost:smtp 0.0.0.0:* LISTEN
tcp 0 52 localhost.localdoma:ssh 192.168.1.120:56520 ESTABLISHED
tcp6 0 0 [::]:ssh [::]:* LISTEN
tcp6 0 0 localhost:smtp [::]:* LISTEN
raw6 0 0 [::]:ipv6-icmp [::]:* 7
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags Type State I-Node Path
unix 2 [ ] DGRAM 8805 /run/systemd/notify
unix 2 [ ] DGRAM 8807 /run/systemd/cgroups-agent
unix 2 [ ACC ] STREAM LISTENING 11629 /run/systemd/private
unix 2 [ ACC ] STREAM LISTENING 20594 /var/run/NetworkManager/private-dhcp
unix 2 [ ACC ] SEQPACKET LISTENING 11638 /run/udev/control
unix 2 [ ACC ] STREAM LISTENING 8822 /run/systemd/journal/stdout
unix 5 [ ] DGRAM 8825 /run/systemd/journal/socket
unix 13 [ ] DGRAM 8827 /dev/log
unix 2 [ ACC ] STREAM LISTENING 12163 /var/run/dbus/system_bus_socket
unix 2 [ ] DGRAM 11669 /run/systemd/shutdownd
unix 2 [ ACC ] STREAM LISTENING 18008 public/pickup
unix 2 [ ACC ] STREAM LISTENING 18012 public/cleanup
unix 2 [ ACC ] STREAM LISTENING 18015 public/qmgr
unix 2 [ ACC ] STREAM LISTENING 18019 private/tlsmgr
unix 2 [ ACC ] STREAM LISTENING 18022 private/rewrite
unix 2 [ ACC ] STREAM LISTENING 18025 private/bounce
列出所有 tcp 端口 netstat -at
[root@localhost net]# netstat -at
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN
tcp 0 0 localhost:smtp 0.0.0.0:* LISTEN
tcp 0 52 localhost.localdoma:ssh 192.168.1.120:56520 ESTABLISHED
tcp6 0 0 [::]:ssh [::]:* LISTEN
tcp6 0 0 localhost:smtp [::]:* LISTEN
列出所有 udp 端口 netstat -au
[root@localhost net]# netstat -au
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
2. 列出所有处于监听状态的 Sockets
只显示监听端口 netstat -l
[root@localhost net]# netstat -l
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN
tcp 0 0 localhost:smtp 0.0.0.0:* LISTEN
tcp6 0 0 [::]:ssh [::]:* LISTEN
tcp6 0 0 localhost:smtp [::]:* LISTEN
raw6 0 0 [::]:ipv6-icmp [::]:* 7
Active UNIX domain sockets (only servers)
Proto RefCnt Flags Type State I-Node Path
unix 2 [ ACC ] STREAM LISTENING 11629 /run/systemd/private
unix 2 [ ACC ] STREAM LISTENING 20594 /var/run/NetworkManager/private-dhcp
unix 2 [ ACC ] SEQPACKET LISTENING 11638 /run/udev/control
unix 2 [ ACC ] STREAM LISTENING 8822 /run/systemd/journal/stdout
unix 2 [ ACC ] STREAM LISTENING 12163 /var/run/dbus/system_bus_socket
unix 2 [ ACC ] STREAM LISTENING 18008 public/pickup
unix 2 [ ACC ] STREAM LISTENING 18012 public/cleanup
unix 2 [ ACC ] STREAM LISTENING 18015 public/qmgr
unix 2 [ ACC ] STREAM LISTENING 18019 private/tlsmgr
unix 2 [ ACC ] STREAM LISTENING 18022 private/rewrite
unix 2 [ ACC ] STREAM LISTENING 18025 private/bounce
unix 2 [ ACC ] STREAM LISTENING 18028 private/defer
unix 2 [ ACC ] STREAM LISTENING 18031 private/trace
unix 2 [ ACC ] STREAM LISTENING 18034 private/verify
unix 2 [ ACC ] STREAM LISTENING 18037 public/flush
unix 2 [ ACC ] STREAM LISTENING 18040 private/proxymap
unix 2 [ ACC ] STREAM LISTENING 18043 private/proxywrite
unix 2 [ ACC ] STREAM LISTENING 18046 private/smtp
unix 2 [ ACC ] STREAM LISTENING 18049 private/relay
unix 2 [ ACC ] STREAM LISTENING 18052 public/showq
unix 2 [ ACC ] STREAM LISTENING 18055 private/error
unix 2 [ ACC ] STREAM LISTENING 18058 private/retry
unix 2 [ ACC ] STREAM LISTENING 18061 private/discard
unix 2 [ ACC ] STREAM LISTENING 18064 private/local
unix 2 [ ACC ] STREAM LISTENING 18067 private/virtual
unix 2 [ ACC ] STREAM LISTENING 18070 private/lmtp
unix 2 [ ACC ] STREAM LISTENING 18073 private/anvil
unix 2 [ ACC ] STREAM LISTENING 18076 private/scache
只列出所有监听 tcp 端口 netstat -lt
[root@localhost net]# netstat -lt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN
tcp 0 0 localhost:smtp 0.0.0.0:* LISTEN
tcp6 0 0 [::]:ssh [::]:* LISTEN
tcp6 0 0 localhost:smtp [::]:* LISTEN
只列出所有监听 udp 端口 netstat -lu
[root@localhost net]# netstat -lu
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
只列出所有监听 UNIX 端口 netstat -lx
[root@localhost net]# netstat -lx
Active UNIX domain sockets (only servers)
Proto RefCnt Flags Type State I-Node Path
unix 2 [ ACC ] STREAM LISTENING 11629 /run/systemd/private
unix 2 [ ACC ] STREAM LISTENING 20594 /var/run/NetworkManager/private-dhcp
unix 2 [ ACC ] SEQPACKET LISTENING 11638 /run/udev/control
unix 2 [ ACC ] STREAM LISTENING 8822 /run/systemd/journal/stdout
unix 2 [ ACC ] STREAM LISTENING 12163 /var/run/dbus/system_bus_socket
unix 2 [ ACC ] STREAM LISTENING 18008 public/pickup
unix 2 [ ACC ] STREAM LISTENING 18012 public/cleanup
unix 2 [ ACC ] STREAM LISTENING 18015 public/qmgr
unix 2 [ ACC ] STREAM LISTENING 18019 private/tlsmgr
unix 2 [ ACC ] STREAM LISTENING 18022 private/rewrite
unix 2 [ ACC ] STREAM LISTENING 18025 private/bounce
unix 2 [ ACC ] STREAM LISTENING 18028 private/defer
unix 2 [ ACC ] STREAM LISTENING 18031 private/trace
unix 2 [ ACC ] STREAM LISTENING 18034 private/verify
unix 2 [ ACC ] STREAM LISTENING 18037 public/flush
unix 2 [ ACC ] STREAM LISTENING 18040 private/proxymap
unix 2 [ ACC ] STREAM LISTENING 18043 private/proxywrite
unix 2 [ ACC ] STREAM LISTENING 18046 private/smtp
unix 2 [ ACC ] STREAM LISTENING 18049 private/relay
unix 2 [ ACC ] STREAM LISTENING 18052 public/showq
unix 2 [ ACC ] STREAM LISTENING 18055 private/error
unix 2 [ ACC ] STREAM LISTENING 18058 private/retry
unix 2 [ ACC ] STREAM LISTENING 18061 private/discard
unix 2 [ ACC ] STREAM LISTENING 18064 private/local
unix 2 [ ACC ] STREAM LISTENING 18067 private/virtual
unix 2 [ ACC ] STREAM LISTENING 18070 private/lmtp
unix 2 [ ACC ] STREAM LISTENING 18073 private/anvil
unix 2 [ ACC ] STREAM LISTENING 18076 private/scache
3. 显示每个协议的统计信息
显示所有端口的统计信息 netstat -s
[root@localhost net]# netstat -s
Ip:
9682 total packets received
0 forwarded
0 incoming packets discarded
9669 incoming packets delivered
1675 requests sent out
Icmp:
33 ICMP messages received
0 input ICMP message failed.
ICMP input histogram:
destination unreachable: 31
echo replies: 2
37 ICMP messages sent
0 ICMP messages failed
ICMP output histogram:
destination unreachable: 31
echo request: 6
IcmpMsg:
InType0: 2
InType3: 31
OutType3: 31
OutType8: 6
Tcp:
0 active connections openings
1 passive connection openings
0 failed connection attempts
0 connection resets received
1 connections established
2517 segments received
1723 segments send out
0 segments retransmited
0 bad segments received.
0 resets sent
Udp:
0 packets received
30 packets to unknown port received.
0 packet receive errors
30 packets sent
0 receive buffer errors
0 send buffer errors
UdpLite:
TcpExt:
29 delayed acks sent
1 packets directly queued to recvmsg prequeue.
746 packet headers predicted
396 acknowledgments not containing data payload received
918 predicted acknowledgments
IPReversePathFilter: 3
TCPRcvCoalesce: 1
TCPAutoCorking: 5
TCPOrigDataSent: 1644
IpExt:
InNoRoutes: 10
InBcastPkts: 7089
InOctets: 838424
OutOctets: 526211
InBcastOctets: 653606
InNoECTPkts: 9682
显示 TCP 或 UDP 端口的统计信息 netstat -st 或 -su
[root@localhost net]# netstat -st
IcmpMsg:
InType0: 2
InType3: 31
OutType3: 31
OutType8: 6
Tcp:
0 active connections openings
1 passive connection openings
0 failed connection attempts
0 connection resets received
1 connections established
2625 segments received
1801 segments send out
0 segments retransmited
0 bad segments received.
0 resets sent
UdpLite:
TcpExt:
32 delayed acks sent
1 packets directly queued to recvmsg prequeue.
790 packet headers predicted
410 acknowledgments not containing data payload received
966 predicted acknowledgments
IPReversePathFilter: 3
TCPRcvCoalesce: 1
TCPAutoCorking: 5
TCPOrigDataSent: 1716
IpExt:
InNoRoutes: 10
InBcastPkts: 7400
InOctets: 874918
OutOctets: 535207
InBcastOctets: 681848
InNoECTPkts: 10101
[root@localhost net]# netstat -su
IcmpMsg:
InType0: 2
InType3: 31
OutType3: 31
OutType8: 6
Udp:
0 packets received
30 packets to unknown port received.
0 packet receive errors
30 packets sent
0 receive buffer errors
0 send buffer errors
UdpLite:
IpExt:
InNoRoutes: 10
InBcastPkts: 7540
InOctets: 895035
OutOctets: 541059
InBcastOctets: 694911
InNoECTPkts: 10343
4. 在 netstat 输出中显示 PID 和进程名称 netstat -p
netstat -p 可以与其它开关一起使用，就可以添加 “PID/进程名称” 到 netstat 输出中，这样 debugging 的时候可以很方便的发现特定端口运行的程序。
[root@localhost net]# netstat -pt
'Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 52 localhost.localdoma:ssh 192.168.1.120:56520 ESTABLISHED 3047/sshd: root@pts
5. 在 netstat 输出中不显示主机，端口和用户名 (host, port or user)
当你不想让主机，端口和用户名显示，使用 netstat -n。将会使用数字代替那些名称。
同样可以加速输出，因为不用进行比对查询。
[root@localhost net]# netstat -an
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
tcp 0 52 192.168.1.205:22 192.168.1.120:56520 ESTABLISHED
tcp6 0 0 :::22 :::* LISTEN
tcp6 0 0 ::1:25 :::* LISTEN
raw6 0 0 :::58 :::* 7
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags Type State I-Node Path
unix 2 [ ] DGRAM 8805 /run/systemd/notify
unix 2 [ ] DGRAM 8807 /run/systemd/cgroups-agent
unix 2 [ ACC ] STREAM LISTENING 11629 /run/systemd/private
unix 2 [ ACC ] STREAM LISTENING 20594 /var/run/NetworkManager/private-dhcp
unix 2 [ ACC ] SEQPACKET LISTENING 11638 /run/udev/control
unix 2 [ ACC ] STREAM LISTENING 8822 /run/systemd/journal/stdout
unix 5 [ ] DGRAM 8825 /run/systemd/journal/socket
unix 13 [ ] DGRAM 8827 /dev/log
unix 2 [ ACC ] STREAM LISTENING 12163 /var/run/dbus/system_bus_socket
unix 2 [ ] DGRAM 11669 /run/systemd/shutdownd
unix 2 [ ACC ] STREAM LISTENING 18008 public/pickup
unix 2 [ ACC ] STREAM LISTENING 18012 public/cleanup
unix 2 [ ACC ] STREAM LISTENING 18015 public/qmgr
unix 2 [ ACC ] STREAM LISTENING 18019 private/tlsmgr
unix 2 [ ACC ] STREAM LISTENING 18022 private/rewrite
unix 2 [ ACC ] STREAM LISTENING 18025 private/bounce
unix 2 [ ACC ] STREAM LISTENING 18028 private/defer
unix 2 [ ACC ] STREAM LISTENING 18031 private/trace
unix 2 [ ACC ] STREAM LISTENING 18034 private/verify
unix 2 [ ACC ] STREAM LISTENING 18037 public/flush
unix 2 [ ACC ] STREAM LISTENING 18040 private/proxymap
unix 2 [ ACC ] STREAM LISTENING 18043 private/proxywrite
unix 2 [ ACC ] STREAM LISTENING 18046 private/smtp
unix 2 [ ACC ] STREAM LISTENING 18049 private/relay
unix 2 [ ACC ] STREAM LISTENING 18052 public/showq
unix 2 [ ACC ] STREAM LISTENING 18055 private/error
unix 2 [ ACC ] STREAM LISTENING 18058 private/retry
unix 2 [ ACC ] STREAM LISTENING 18061 private/discard
unix 2 [ ACC ] STREAM LISTENING 18064 private/local
unix 2 [ ACC ] STREAM LISTENING 18067 private/virtual
unix 2 [ ACC ] STREAM LISTENING 18070 private/lmtp
unix 2 [ ACC ] STREAM LISTENING 18073 private/anvil
unix 2 [ ACC ] STREAM LISTENING 18076 private/scache
unix 3 [ ] STREAM CONNECTED 18024
unix 3 [ ] STREAM CONNECTED 18006
unix 2 [ ] DGRAM 15804
unix 3 [ ] STREAM CONNECTED 13803
unix 3 [ ] STREAM CONNECTED 18010
unix 3 [ ] STREAM CONNECTED 18021
unix 3 [ ] STREAM CONNECTED 16073 /var/run/dbus/system_bus_socket
unix 3 [ ] STREAM CONNECTED 18013
unix 3 [ ] STREAM CONNECTED 13854
unix 2 [ ] DGRAM 18705
unix 2 [ ] DGRAM 13801
unix 3 [ ] STREAM CONNECTED 18017
unix 2 [ ] DGRAM 18713
unix 3 [ ] STREAM CONNECTED 12169 /run/systemd/journal/stdout
unix 3 [ ] STREAM CONNECTED 13842
unix 3 [ ] STREAM CONNECTED 18009
unix 3 [ ] STREAM CONNECTED 14985
unix 3 [ ] STREAM CONNECTED 18027
unix 3 [ ] STREAM CONNECTED 18026
unix 3 [ ] STREAM CONNECTED 15079
unix 3 [ ] STREAM CONNECTED 18633
unix 3 [ ] STREAM CONNECTED 13802
unix 3 [ ] STREAM CONNECTED 15026
unix 3 [ ] STREAM CONNECTED 18020
unix 3 [ ] STREAM CONNECTED 12166 /run/systemd/journal/stdout
unix 3 [ ] STREAM CONNECTED 18016
unix 3 [ ] STREAM CONNECTED 13855 /var/run/dbus/system_bus_socket
unix 3 [ ] STREAM CONNECTED 18007
unix 3 [ ] STREAM CONNECTED 13853
unix 3 [ ] STREAM CONNECTED 18023
unix 3 [ ] STREAM CONNECTED 18029
unix 3 [ ] STREAM CONNECTED 12869 /run/systemd/journal/stdout
unix 3 [ ] STREAM CONNECTED 18014
unix 2 [ ] DGRAM 13112
unix 2 [ ] DGRAM 13966
unix 3 [ ] STREAM CONNECTED 12867
unix 3 [ ] STREAM CONNECTED 18074
unix 3 [ ] STREAM CONNECTED 12954 /run/systemd/journal/stdout
unix 2 [ ] DGRAM 15028
unix 2 [ ] DGRAM 17279
unix 3 [ ] STREAM CONNECTED 18053
unix 3 [ ] STREAM CONNECTED 18048
unix 3 [ ] STREAM CONNECTED 18075
unix 3 [ ] STREAM CONNECTED 18033
unix 3 [ ] STREAM CONNECTED 18078
unix 3 [ ] STREAM CONNECTED 13856 /var/run/dbus/system_bus_socket
unix 3 [ ] STREAM CONNECTED 18077
unix 3 [ ] STREAM CONNECTED 18032
unix 3 [ ] STREAM CONNECTED 18030
unix 3 [ ] STREAM CONNECTED 12286
unix 3 [ ] DGRAM 14562
unix 3 [ ] STREAM CONNECTED 12287 /var/run/dbus/system_bus_socket
unix 2 [ ] DGRAM 20340
unix 2 [ ] DGRAM 15161
unix 3 [ ] STREAM CONNECTED 18035
unix 2 [ ] DGRAM 15152
unix 3 [ ] STREAM CONNECTED 12288 /var/run/dbus/system_bus_socket
unix 3 [ ] STREAM CONNECTED 13113
unix 3 [ ] STREAM CONNECTED 12167 /run/systemd/journal/stdout
unix 2 [ ] DGRAM 23685
unix 3 [ ] STREAM CONNECTED 18054
unix 3 [ ] STREAM CONNECTED 18036
unix 3 [ ] STREAM CONNECTED 12953
unix 3 [ ] STREAM CONNECTED 17038
unix 2 [ ] DGRAM 14548
unix 3 [ ] STREAM CONNECTED 18039
unix 3 [ ] STREAM CONNECTED 13105 /run/systemd/journal/stdout
unix 3 [ ] STREAM CONNECTED 18057
unix 3 [ ] STREAM CONNECTED 18038
unix 3 [ ] STREAM CONNECTED 15421
unix 3 [ ] STREAM CONNECTED 18044
unix 3 [ ] STREAM CONNECTED 18060
unix 3 [ ] STREAM CONNECTED 12501 /run/systemd/journal/stdout
unix 3 [ ] STREAM CONNECTED 18059
unix 3 [ ] STREAM CONNECTED 18047
unix 3 [ ] STREAM CONNECTED 18062
unix 3 [ ] STREAM CONNECTED 18050
unix 3 [ ] STREAM CONNECTED 15711 /run/systemd/journal/stdout
unix 3 [ ] STREAM CONNECTED 14546
unix 3 [ ] STREAM CONNECTED 18063
unix 3 [ ] STREAM CONNECTED 18066
unix 3 [ ] STREAM CONNECTED 18042
unix 3 [ ] STREAM CONNECTED 18065
unix 3 [ ] STREAM CONNECTED 18041
unix 3 [ ] DGRAM 14561
unix 3 [ ] STREAM CONNECTED 18068
unix 3 [ ] STREAM CONNECTED 15038
unix 3 [ ] STREAM CONNECTED 13104
unix 3 [ ] STREAM CONNECTED 15169 /var/run/dbus/system_bus_socket
unix 2 [ ] DGRAM 12394
unix 3 [ ] STREAM CONNECTED 18056
unix 3 [ ] STREAM CONNECTED 18045
unix 3 [ ] STREAM CONNECTED 18069
unix 3 [ ] STREAM CONNECTED 18072
unix 3 [ ] STREAM CONNECTED 18051
unix 3 [ ] STREAM CONNECTED 18071
6. 持续输出 netstat 信息
netstat 将每隔一秒输出网络信息。
[root@localhost net]# netstat -c
7. 显示核心路由信息 netstat -r
[root@localhost net]# netstat -r
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
default gateway 0.0.0.0 UG 0 0 0 bond0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 bond0
8. 找出程序运行的端口
并不是所有的进程都能找到，没有权限的会不显示，使用 root 权限查看所有的信息。
[root@localhost net]# netstat -ap|grep ssh
tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN 1073/sshd
tcp 0 52 localhost.localdoma:ssh 192.168.1.120:56520 ESTABLISHED 3047/sshd: root@pts
tcp6 0 0 [::]:ssh [::]:* LISTEN 1073/sshd
unix 2 [ ] DGRAM 20340 3047/sshd: root@pts
找出运行在指定端口的进程
[root@localhost net]# netstat -an|grep 22
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 52 192.168.1.205:22 192.168.1.120:56520 ESTABLISHED
tcp6 0 0 :::22
9. 显示网络接口列表
[root@localhost net]# netstat -i
Kernel Interface table
Iface MTU RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
bond0 1500 34778 0 0 0 2279 0 0 0 BMmRU
ens33 1500 19106 0 0 0 2293 0 0 0 BMsRU
ens34 1500 15778 0 0 0 5 0 0 0 BMsRU
lo 65536 105 0 0 0 105 0 0 0 LRU
显示详细信息，像是 ifconfig 使用 netstat -ie:
[root@localhost net]# netstat -ie
Kernel Interface table
bond0: flags=5187<UP,BROADCAST,RUNNING,MASTER,MULTICAST> mtu 1500
inet 192.168.1.205 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::b296:1197:e1d4:6b6 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:61:cf:79 txqueuelen 1000 (Ethernet)
RX packets 35278 bytes 3126800 (2.9 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2288 bytes 858051 (837.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens33: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST> mtu 1500
ether 00:0c:29:61:cf:79 txqueuelen 1000 (Ethernet)
RX packets 19361 bytes 1708695 (1.6 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2302 bytes 859421 (839.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens34: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST> mtu 1500
ether 00:0c:29:61:cf:79 txqueuelen 1000 (Ethernet)
RX packets 16023 bytes 1428346 (1.3 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 5 bytes 660 (660.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1 (Local Loopback)
RX packets 105 bytes 9048 (8.8 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 105 bytes 9048 (8.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0