How to search contents of multiple pdf files?

Question

How could I search the contents of PDF files in a directory/subdirectory? I am looking for some command line tools. It seems that grep can\'t search PDF files.<

Answer 1

Recoll is a fantastic full-text GUI search application for Unix/Linux that supports dozens of different formats, including PDF. It can even pass the exact page number and search term of a query to the document viewer and thus allows you to jump to the result right from its GUI.

Recoll also comes with a viable command-line interface and a web-browser interface.