My problem is related to USB tethering and network interfaces.
When I run
ifconfig -a, normally I see 3 interfaces - loopback, WiFi and Ethernet. I have defined gateway, netmask and broadcast for each one of them in
Sometimes I connect my phone to my machine for USB tethering and when running
ifconfig -a I can see 1 more interface called
enp0s20u2. This interface is shown only when the phone is connected and USB tethering is enabled in it. In order to bring up that interface, I've added the following lines in
# For USB tethering auto enp0s20u2 iface enp0s20u2 inet dhcp address 192.168.42.56 gateway 192.168.42.1 netmask 255.255.255.0 broadcast 192.168.42.255
This way, When I connect my phone, this interface is automatically brought up and configured.
The problem is that the systemd service can't start if the phone is not connected. The
enp0s20u2 interface is unknown most of the time, Therefore
systemctl fails to bring it up on startup as well as when I manually run
systemctl restart networking.
Is there a way to assure this interface configuration won't make the service fail to start?