I tried to use
sudo service networking restart
and
sudo /etc/init.d/network restart
but they both crash the window manager and I can no longer use my keyboard for input into X.
when I use the /etc/init.d/ method it complains saying that I should use the service utility
e.g. service networking restart
but it crashes just the same.
Is there a GUI method of restarting networking?
Try
sudo service network-manager restart
Or on recent Ubuntu versions:
sudo systemctl restart systemd-networkd
instead.
Ubuntu uses network-manager instead of the traditional Linux networking model. so you should restart the network-manager service instead of the network service. Or use ifup/down.
Check this answer.
Restarting networking on a desktop machine will cause dbus and a bunch of service to stop and never be started again, usually leading to the whole system being unusable.
As Ubuntu does event based network bring up, there quite simply isn't a way to undo it all and redo it all, so a restart just isn't plain possible. The recommended way instead is to use ifdown and ifup on the interfaces you actually want to reconfigure:
sudo ifdown --exclude=lo -a && sudo ifup --exclude=lo -a
ubuntu CLI: to restart the network service either
sudo /etc/init.d/networking restart
or
ifdown eth0
ifup eth0
sudo service network-manager restart
nor:
sudo service networking restart
Doesn't work on Ubuntu server 14.04
only:
sudo ifdown eth0:0
sudo ifup eth0:0
Works. Change eth0:0 to your interface.
I've got the same issue. Its a known bug https://bugs.launchpad.net/ubuntu/+source/dbus/+bug/1102507
Using service network-manager restart works through
I do not really think there's GUI method - by default at least.
I'm also not sure what do You mean by 'restarting networking service', but I feel that the following could help.
sudo killall NetworkManager
It kills NetworkManger which automatically restarts after this. It doesn't break the system.
sudo killall NetworkManager && sudo NetworkManager
Based on my personal experience, it seems that in Ubuntu 16.04 NetworkManager does not always restart by itself and it's better to start it manually.
If you can restart the network using the applet of NetworkManager, you do not need to restart NetworkManager itself (at least, most of the time).
In that case to restart all the connections, use this code from a shell or in a script:
nmcli nm enable false
sleep 5
nmcli nm enable true
Details can be found in the NetworkManagar command-line interface manual page.
Notice that these commands acts as the applet, so they do not need any additional privilege (no sudo or whatever).
In ubuntu 14.04 they have a new "feature" that makes it impossible to restart. Force the interface down and up works.
sudo ip link set eth0 down
sudo ip link set eth0 up
I am able to restart the network service on ubuntu with command.
sudo systemctl restart network-manager
if ubuntu 14.04 Desktop or Server, you can restart you network by:
sudo -i
( ifdown $(ifquery --list -X lo|xargs echo) && ifup $(ifquery --list -X lo|xargs echo) )&
An alternative approach for the server (as of Ubuntu 18.04):
Install ifupdown2 package :
apt install ifupdown2
Use service networking restart command
rmano's answer is brilliant. Solves so many issues.
Remark to improve: In U15 I experience a different syntax for nmcli:
For analysis do:
nmcli networking connectivity
To stop service do:
nmcli networking off
and to restart do:
nmcli networking on
No sudo required. Thanks rmano!
This uses Ubuntu's network-manager to disable, then enable eth0:
nmcli nm enable false eth0 && nmcli nm enable true eth0
If your connection has a different name, use it. You can learn your connections name by using the command:
nmcli c status
