I am working on Ubuntu OS.
Initially my pc configuration was Intel core 2 duo 3.0GH with 320 GB HDD. After some times, my friend changed the motherboard with lower version of configuration without changing the HDD.
Still the Ubuntu OS is working fine and all data is safe. I want to know that from where I would know the previous MAC address(the machines physical address)? Does the system keep any log file in Hard disk ? If yes, then how to know?