Edit PDF metadata

View PDF metadata:

# exiftool file.pdf

View specific metadata:

# exiftool -Creator file.pdf
# find . -type f -iname '*.pdf' -exec exiftool -Creator {} \;

Set metadata:

# exiftool -Creator='barbapappa' file.pdf
# find . -type f -iname '*.pdf' -exec exiftool -Creator='barbapappa' {} \;

to preserve date/time:

-overwrite_original_in_place