我使用电缆将我的电脑连接到路由器，并且还连接了 WIFI USB TP-LINK。
只需检查ifconfig-a，我就会发现没有eth0接口。相反，第一个被调用br-ba165999130f，我认为是eth0（无论我是否拔出 WIFI USB）。
milano@milano-desktop:~$ ifconfig -a
br-ba165999130f: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.18.0.1 netmask 255.255.0.0 broadcast 172.18.255.255
ether 02:42:4a:c5:46:fb txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:56:a3:3e:ce txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.100.135 netmask 255.255.255.0 broadcast 192.168.100.255
inet6 fe80::5fac:7701:876b:133e prefixlen 64 scopeid 0x20<link>
ether 70:85:c2:7c:b8:ff txqueuelen 1000 (Ethernet)
RX packets 1575526 bytes 1425272914 (1.4 GB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 737541 bytes 87452976 (87.4 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 16 memory 0xa3300000-a3320000
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 1000 (Local Loopback)
RX packets 14642 bytes 2453399 (2.4 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 14642 bytes 2453399 (2.4 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
vmnet1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.16.79.1 netmask 255.255.255.0 broadcast 172.16.79.255
inet6 fe80::250:56ff:fec0:1 prefixlen 64 scopeid 0x20<link>
ether 00:50:56:c0:00:01 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1525 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
vmnet8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.70.1 netmask 255.255.255.0 broadcast 192.168.70.255
inet6 fe80::250:56ff:fec0:8 prefixlen 64 scopeid 0x20<link>
ether 00:50:56:c0:00:08 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1525 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
这背后的原因是什么？
答案1
这不太对。界面br-ba165999130f是一座虚拟桥梁。你无法找到eth0不再是因为，现在的改变udevd，为以太网设备分配名称。设备现在根据“可预测的接口名称方案”。https://wiki.debian.org/NetworkInterfaceNames
就你的情况而言，前者eth0是接口eno1en=Ethernet。要标记接口是虚拟设备还是真实设备，可以执行 ls -la /sys/class/net。所有接口都列出来了。
ls -la /sys/class/net
total 0
drwxr-xr-x 2 root root 0 Jul 18 16:46 .
drwxr-xr-x 87 root root 0 Jul 18 16:46 ..
lrwxrwxrwx 1 root root 0 Jul 18 14:46 br-5888a0968254 -> ../../devices/virtual/net/br-5888a0968254
lrwxrwxrwx 1 root root 0 Jul 18 14:46 br-701dd1212771 -> ../../devices/virtual/net/br-701dd1212771
lrwxrwxrwx 1 root root 0 Jul 18 14:46 br-b00d55f5f1b1 -> ../../devices/virtual/net/br-b00d55f5f1b1
lrwxrwxrwx 1 root root 0 Jul 18 14:46 br-c8cc7afb1a4e -> ../../devices/virtual/net/br-c8cc7afb1a4e
lrwxrwxrwx 1 root root 0 Jul 18 14:46 docker0 -> ../../devices/virtual/net/docker0
lrwxrwxrwx 1 root root 0 Jul 19 08:45 enx08920494661c -> ../../devices/pci0000:00/0000:00:07.1/0000:39:00.0/0000:3a:02.0/0000:3b:00.0/usb6/6-2/6-2.4/6-2.4:1.0/net/enx08920494661c
lrwxrwxrwx 1 root root 0 Jul 18 16:46 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx 1 root root 0 Jul 18 14:51 veth5501186 -> ../../devices/virtual/net/veth5501186
lrwxrwxrwx 1 root root 0 Jul 18 14:46 wlp0s20f3 -> ../../devices/pci0000:00/0000:00:14.3/net/wlp0s20f3
此接口是虚拟的
lrwxrwxrwx 1 root root 0 Jul 18 14:46 br-5888a0968254 -> ../../devices/virtual/net/br-5888a0968254
此接口是PCIe网络设备
lrwxrwxrwx 1 root root 0 Jul 19 08:45 enx08920494661c -> ../../devices/pci0000:00/0000:00:07.1/0000:39:00.0/0000:3a:02.0/0000:3b:00.0/usb6/6-2/6-2.4/6-2.4:1.0/net/enx08920494661c
驱动程序可能不正确。该棒是否出现在 lsusb 下？