Make Tech Easier - http://feeds.maketecheasier.com/~r/MakeTechEasier/~3/QgEUl5iy10Y/
Command line utilities such as grep and ack-grep are great for searching plain-text files for patterns matching a specified regular expression. But have you ever tried using these utilities to search for patterns in a PDF file? Well, don’t! You will not get any result as these tools cannot read PDF files; they only read plain-text files. pdfgrep, as the name suggests, is a small command line utility that makes it possible to search for text in a PDF file without opening the file. It is insanely fast – faster than the search provided by virtually all PDF document viewers.