First step is to check the status of the interfaces. For this, we will use the net-tools package.
sudo apt install net-tools
Then, we can see the interfaces status
In my case, I have this status of my interface wlan0:
ubuntu@ubuntu:~$ ifconfig -a wlan0 wlan0: flags=4098<BROADCAST,MULTICAST> mtu 1500 ether dc:a6:32:6c:xx:xx 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
In the flags only there are 2 (BROADCAST,MULTICAST), but there is no “UP” flag.Continue reading How to set up WIFI on Ubuntu running on the Raspberry PI 4