According to this question, How can I convert a series of images to a PDF from the command line on linux?, ImageMagick can convert multiple images to a single PDF.
How could I reverse the operation and convert a PDF of several pages to multiple images?
I have tried the following command, but I got the errors shown:
$ convert test.pdf test-%02.png convert-im6.q16: attempt to perform an operation not allowed by the security policy `PDF' @ error/constitute.c/IsCoderAuthorized/408. convert-im6.q16: no images defined `test-%02.png' @ error/convert.c/ConvertImageCommand/3258.
gs was installed:
$ gs --version 9.26
$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 19.04 Release: 19.04 Codename: disco