When using GAiA, it might be necessary to temporarily change the MAC address of the interface eth 0 to 00:0C:29:12:34:56. After restarting the network the old MAC address should be active. How do…

The expert-user commands described in this option imply a method that persists the configuration, meaning the MAC address would not automatically revert to the original after a network restart.

Editing /etc/sysconfig/netconf.C writes the MAC address into a persistent configuration file, so the change would survive a network restart and the original address would not be restored automatically.

Running a command such as 'ifconfig eth0 hw ether 00:0C:29:12:34:56' as an expert user applies the MAC address change only to the in-memory network state. Because this command does not write to any persistent configuration file, the original MAC address is restored automatically when the network service restarts, satisfying the requirement for a temporary change.

Configuring the MAC address via the GAiA WebUI (Network > Connections > eth0) also writes to persistent storage, causing the new MAC address to remain active after a network restart rather than reverting.