Update cheatsheets

linux/pdfxup

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pdfxup
+
+> N-up PDF pages.
+> N-upping means putting multiple pages onto one page by scaling and rotating them into a grid.
+> More information: <https://ctan.org/pkg/pdfxup>.
+
+- Create a 2-up PDF:
+
+`pdfxup -o {{path/to/output.pdf}} {{path/to/input.pdf}}`
+
+- Create a PDF with 3 columns and 2 lines per page:
+
+`pdfxup -x {{3}} -y {{2}} -o {{path/to/output.pdf}} {{path/to/input.pdf}}`
+
+- Create a PDF in booklet mode (2-up, and pages are sorted to form a book when folded):
+
+`pdfxup -b -o {{path/to/output.pdf}} {{path/to/input.pdf}}`