If you are a CLI enthusiast like myself and always looking for a file but don't know where it is exactly then I got a solution for you
First install mlocate in your system
update: I failed to mention that you need to first update your database before searching anything
put this in your terminal
However, if you search for something that is very common you will get hundreds of results and that won't be ideal.
My typical command is the following
locate keyword | grep keyword
grep searches one or more files for lines that matches a regular expression pattern.
Hope this helps whenever you are trying to edit a file that you haven't touched in months.