PDF compressing and splitting
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Uploading files might encount size limitation, in which case files need to be compressed and/or split. Here is an effective and easy way in Fedora.
pdfinfo <pdf_file> is a built-in command Fedora, and it will show several information about an pdf file, such as creator, date, pages, page size, file size, etc.
pdfjam <pdf_file> begin-end will extract the specific pages with page number from begin to end.
Actually, there is a easy-to-use online tool, pdf2go, with many helpful functions about pdf.