Edit PDF On The Command Line Is there a way to blacken parts of a pdf file (i.e. personal data that I don't want to send with the pdf)? Maybe from the command line where I can say make everything black on page 2 from pixel X455 to X470 and Y300 to Y320.

In the end I managed to do it with `GIMP`.
You can open .pdfs in `Gimp` and edit them.
I took a black paintbrush to redact some text.
Then I clicked on export and used a .pdf ending and it was exported to PDF (with some quality loss).