Q:slow boot time ubuntu - A start job is running for Raise network interfaces

ubuntu16.04.02_x64

editing the file:

sudo vim /etc/systemd/system/network-online.targets.wants/networking.service
And changing the following line at the end of the file:

TimeoutStartSec=5min
to:
TimeoutStartSec=10sec

I have then rebooted the system and it works fine.

If you dont want to reboot the system again, just reboot the daemon by: