Setup IP address manyally, e.g. setup IP address as 192.168.35.100

sudo ifconfig usb0 192.168.35.100 up

You also need to setup the IP address on your PC, e.g. 192.168.35.110

Check network connection:

khadas@Khadas:~$ ping -I usb0 192.168.35.110
PING 192.168.35.110 (192.168.35.110) from 192.168.35.100 usb0: 56(84) bytes of data.
64 bytes from 192.168.35.110: icmp_seq=1 ttl=64 time=1.19 ms
64 bytes from 192.168.35.110: icmp_seq=2 ttl=64 time=1.33 ms
64 bytes from 192.168.35.110: icmp_seq=3 ttl=64 time=1.21 ms
64 bytes from 192.168.35.110: icmp_seq=4 ttl=64 time=1.22 ms
64 bytes from 192.168.35.110: icmp_seq=5 ttl=64 time=1.28 ms
^C
--- 192.168.35.110 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4007ms
rtt min/avg/max/mdev = 1.193/1.245/1.328/0.050 ms

Try to access the devices via adb.

$ adb kill-server
$ adb devices
* daemon not running; starting now at tcp:5037
* daemon started successfully
List of devices attached
12036c819990    device
$ adb shell
root@Khadas:/#
root@Khadas:/#
root@Khadas:/#
root@Khadas:/#