使用 Ubuntu 18 - 我可以插入一个非常旧的 USB2 USB wifi 加密狗，并且工作正常 - 但速度相当慢。
所以我刚刚购买了一个新的 USB3 加密狗来获得更快的速度。
最初我可以看到该设备，lsusb但它没有出现在ifconfig列表中。因此，我不得不安装一个新的 realtek 驱动程序“rtl88x2bu wifi 适配器驱动程序” - 现在我可以看到该设备：
root@tv:/home/mediaserver/drivers/rtl88x2bu# lsusb
Bus 002 Device 002: ID 8087:8001 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8009 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 004: ID 2357:011e TP-Link 802.11ac WLAN Adapter
Bus 003 Device 002: ID 0bda:b812 Realtek ... USB3.0 802.11ac 1200M Adapter <==== THIS ONE
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@tv:/home/mediaserver/drivers/rtl88x2bu# ifconfig
eno1: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 40:16:7e:ad:d8:81 txqueuelen 1000 (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
device interrupt 20 memory 0xdfc00000-dfc20000
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 154 bytes 14484 (14.4 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 154 bytes 14484 (14.4 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlx90de80df6a1b: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 <==== THIS ONE
ether 90:de:80:df:6a:1b txqueuelen 1000 (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
wlxd037451bf5ac: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 2312
inet 192.168.1.120 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::5669:c0a2:a3cb:c02a prefixlen 64 scopeid 0x20<link>
inet6 2a00:23c7:a324:f601:b7ec:6dcb:df40:2bbb prefixlen 64 scopeid 0x0<global>
ether d0:37:45:1b:f5:ac txqueuelen 1000 (Ethernet)
RX packets 563 bytes 125266 (125.2 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 470 bytes 84199 (84.1 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
您可以看到标有“THIS ONE”注释的设备。您可以看到它没有 IP 地址。
我努力了：
ifconfig wlx90de80df6a1b 192.168.1.121 up
它似乎给了它一个 IP 地址 - 我可以在本地 PC 上 ping 通这两个地址...但现在我无法从网络上的任何其他 PC ping 通任何一个地址（192.168.1.120 或新的 192.168.1.121）。
ifconfig 显示：
wlx90de80df6a1b: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 192.168.1.121 netmask 255.255.255.0 broadcast 192.168.1.255 <==== NEW
ether 90:de:80:df:6a:1b txqueuelen 1000 (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
wlxd037451bf5ac: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 2312
inet 192.168.1.120 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::5669:c0a2:a3cb:c02a prefixlen 64 scopeid 0x20<link>
inet6 2a00:23c7:a324:f601:b7ec:6dcb:df40:2bbb prefixlen 64 scopeid 0x0<global>
ether d0:37:45:1b:f5:ac txqueuelen 1000 (Ethernet)
RX packets 1169 bytes 207937 (207.9 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 831 bytes 151896 (151.8 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
所以我现在对发生的事情感到困惑。有什么想法可以测试/调试吗？
加法 1
从 Ubuntu PC 我可以 ping 外部位置（例如www.google.com）和我的其他网络电脑可以通过旧适配器连接到互联网，但不能通过新适配器连接到互联网：
ping -I wlxd037451bf5ac www.google.com- 好的ping -I wlx90de80df6a1b www.google.com- 不工作