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The HWADDR "directive is useful for machines with multiple NICs to ensure that the interfaces are assigned the correct device names regardless of the configured load order for each NIC's module. Note: in the file is a value HWADDR - This is not the same thing. In Red Hat Enterprise Linux ( RHEL) and other similar systems ( Fedora, CentOS, etc.) an easy way to make changes "permanent" across reboots is to add an appropriate entry to the /etc/sysconfig/network-scripts/ifcfg-ethN file (ifcfg-eth0 for the first Ethernet interface config file, ifcfg-eth1 - for the second, etc.): In openSUSE and other SUSE-based systems ( SUSE enterprise desktop\server, etc.) you can make changes "permanent" across reboots by adding an appropriate entry to the /etc/sysconfig/network/ifcfg-ethN file (ifcfg-eth0 for the first Ethernet interface config file, ifcfg-eth1 - for the second, etc.): Making Changes Permanent - Surviving a Reboot NOTE: You may not be able do this if using a DSL modem (depending on modem vendor or ISP). To confirm your setting, you may prefer to execute " ip link ls eth0" or " ip addr ls eth0" instead of " ifconfig eth0". etc/init.d/network stop ip link set eth0 address 02:01:02:03:04:08 /etc/init.d/network start If you have iproute2 utilities installed, you may prefer to use the " ip" command, as follows: CentOS and Scientific Linux), to disable and restart networking, one must stop and start /etc/init.d/network, instead of /etc/init.d/networking. Alternatively, under RHEL/ Fedora and possibly other GNU/Linux distributions (incl. The above should work on Debian, Ubuntu, and similar distributions. etc/init.d/networking stop ifconfig eth0 hw ether 02:01:02:03:04:08 /etc/init.d/networking start prepended with "sudo "), in order for things to work! NOTE: Commands below MUST be executed with root privileges (e.g.
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Substitute according to your requirements. NOTE: MAC addresses used within this article are provided for example only. Kindly help me out with finding out the MAC address for the first available active interface.Under GNU/Linux, the MAC address of a network interface card (NIC) can be changed by following the procedures below. But if somehow, instead of eth0, my interfaces start with eth1, what will happen in that case? Also on OS X the interface names are different.Īlso, the interface eth0 may be present but is unused. Right now, all of the answers mentioned getting the MAC address always use eth0.
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