Reverting of CentOS file to previous state after power outage There was some issues with the power supply for a CentOS 7 server which caused it to shutdown. After sorting the supply issue and turning on the server it was found that the `/etc/hosts` file which contained the static IP had returned to the IP address that had been changed approximately a week ago. Is it possible that the issue with the power supply caused this change? If so why did this occur and how do I find more information on this (such as what other changes were made)?

> Is it possible that the issue of the power supply caused this change?

Considering the age not very likely but possible. I'd personally be looking elsewhere.

> If so why did this occur and how do I find more information on this (such as what other changes were made)?

An unexpected system restart/shutdown often leads to a fsck utility pass, however nothing is logged in the process, so it's impossible to know what really happened.