Two wireless network adapters in ubuntu

Because the chinanet signal is not strong, I bought a usb wireless network card for two wireless network cards in ubuntu. I usually want to develop it again. I have to connect it to the development board. I don't know what's going on, once the wireless network adapter is connected to the intranet, the Internet cannot be accessed. After searching the Internet for a long time, I finally found the solution... because the chinanet signal is not strong, I bought a usb wireless network card for two wireless network cards in ubuntu. I usually want to develop it again. I have to connect it to the development board. I don't know what's going on, once the wireless network adapter is connected to the intranet, the Internet cannot be accessed. After searching on the Internet for a long time, I finally found a solution. when multiple NICs are enabled in the system, Ubuntu will use the NIC set by "default gateway" (default gateway) to link. Therefore, the solution is to set the ubuntu default gateway to the NIC gateway connected to the Internet. Step: 1. use ifconfig to view your ip address. connect your usb wireless network card to chinanet. ip address: 123.163.31.18. 2. use sudo ifconfig to add default gw 123.163.31.1 (each person may be different, check your own) there can be multiple default gateways. To delete unnecessary default gateways, run the following command: sudo route del default gw 123.163.31.1 to connect to the intranet and the Internet.