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I ask a very simple question, how to reconfigure network on Ubuntu Server LTS 16.04 without reboot ?

Usaly, I edit "/etc/network/interfaces" make the changes and then run "sudo /etc/init.d/networking restart" and everything done. It works on all Linux Debian family I know, but it has no effect on all Ubuntu Server LTS 16.04 I have installed.

I always need to reboot the host to update my network configuration (this take me back to the 90s when needed to restart Windows when changing TCP/IP setting)

I also ran : 

sudo /etc/init.d/networking stop

I can confirm that all Interfaces are down with :

sudo ifconfig

Start again but, still loading old config.

sudo /etc/init.d/networking start

And also tried :

sudo ifdown eno1
sudo ifconfig
sudo ifup eno1
benoit974
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    Did you try flushing the IP addresses via `flush` and restarting via `systemctl`? `sudo ip addr flush eno1 && sudo systemctl restart networking.service`? – Lenniey Jul 03 '17 at 13:16
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    It works when doing : `sudo ifdown eno1 && sudo ip addr flush eno1 && sudo ifup eno1` thank you – benoit974 Jul 03 '17 at 14:00
  • I tried `systemctl restart networking.service` I have the same issue. So networking.service look not flushing interfaces. – benoit974 Jul 03 '17 at 14:09
  • I'd recommend (as always) to check syslog and your config itself, maybe even add it to your question. – Lenniey Jul 03 '17 at 14:10
  • You should close your question, as it is resolved – Lenniey Jul 04 '17 at 06:53

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