Hosts file location is windows\System32\drivers\etc\hosts
Copy hosts file to desktop or any other folder you don't need administrative privileges to save stuff in. Edit with notepad. Put these two lines in it and click save. It'll save it without adding a file extension:
127.0.0.1 a.ekansovi.com
127.0.0.1 ekansovi.com
Copy file, paste it back into \etc and click continue when it asks for admin privileges.
If you're on Linux, I don't know the Linux equivalent to a hosts file, or if that even exists.