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I have second network interface and I want to allow non-root users to configure it (Ubuntu). Is it possible to do this with udev or setcap? What should I rather use and how?

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Welcome to Super User! Instead of naming the problem as solved, use the Answer box below to say what you did to fix it – Canadian Luke Aug 27 '12 at 16:52
up vote 0 down vote accepted

To allow network interface, for example eth1 to user cisco, edit /etc/sudoers with a "safe editor" like vim:

cisco All = (root) NOPASSWD: /sbin/ifconfig eth1 *

NOTE: Taken from the OP's edit to his post

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