Nov 26, 2008
How to manage my .ssh/known_hosts file - Server Fault Ubuntu by default hashes hostnames the known_hosts file (this is not the default openssh behaviour), to make it difficult for anyone reading the file to know what systems you access. If you really wanted to clean out the file, simplest option is probably just delete it and check the keys for servers you know as they arise, but really I'd just Ubuntu 18.04 LTS change hostname permanently - nixCraft Jan 22, 2020 How To Set Up Apache Virtual Hosts on Ubuntu 14.04 LTS
How to Edit Your Hosts File on Linux, Windows, and macOS
The Hosts File in Ubuntu - Rob Golding Nov 26, 2008 How to setup Samba File Sharing Server on Ubuntu | Linux Dec 22, 2019
sudo rm /etc/hosts then type in. sudo nano /etc/hosts Press CTRL + shift + V. Then your hosts file shoud look like this. 127.0.0.1 localhost 127.0.0.1 ASUS and then press Ctrl + X to save. That should restore what your father did. unless he deleted 127.0.0.1 from the host file.
Jul 25, 2017 How to Edit the HOSTS File in Windows - Lifewire