pdfinfo: Find Out PDF File Information From A UNIX / Linux Shell Prompt last updated January 24, 2009 in Categories CentOS, Debian / Ubuntu, Linux, RedHat and Friends, Solaris-Unix, Suse, Troubleshooting, Ubuntu Linux, UNIXQ. How do I find out more information about Portable Document Format (PDF) document from a shell prompt? How do I find out information such as what software used to create a pdf file, its page size, and its creation date etc, using the terminal?