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As far as I know karmic uses upstart to control some of the services. Is there any way to restart the networking service without rebooting the system?

The problem is that when I try to do it in any way I know I fail.

sudo service networking restart reports:

restart: Unknown instance:

sudo initctl restart networking reports:

initctl: Unknown instance:

sudo invoke-rc.d networking restart reports:

Ignoring unknown interface eth0=eth0

All I need is just to launch a script which was recenltly added to /etc/network/if-pre-up.d.

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You may want a different jobspec. Try one of these:

sudo initctl restart network-manager

sudo initctl restart network-interface INTERFACE=eth0
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Thanks for the second recipe. But alas it doesn't run any of the scripts from /etc/network/if-pre-up.d/ – igorp1024 Feb 2 '10 at 14:44

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