Ubuntu, search for a file and also look in all sub-directories?

Question

If I am in a particular directory path, I want to search for all files in any folder/sub-folder.

How can I do this?

Answer 1

In a terminal:

To list all files in the current directory and all sub-directories:

$ find .

To search for a file by name in the current directory and all sub-directories:

$ find . -name <file_name>

Or to search in all files in the current directory and all sub-directories for a particular string:

$ grep -R "<string>" *