How can I find a specific file from a Linux terminal?
Find from root path find / -name "index.html"
Find from current path find . -name "index.html"
The below line of code would do it for you.
find / -name index.html
However, on most Linux servers, your files will be located in /var/www or in your user directory folder /home/(user) depending on how you have it set up. If you're using a control panel, most likely it'll be under your user folder.