Search text in PDF files.
pdfgrep {{pattern}} {{file.pdf}}
pdfgrep --with-filename --page-number {{pattern}} {{file.pdf}}
pdfgrep --max-count {{3}} --ignore-case {{'^foo'}} {{file.pdf}}
.pdf
extension in the current directory recursively:pdfgrep --recursive {{pattern}}
pdfgrep --recursive --include {{'*book.pdf'}} {{pattern}}