How to merge multiple PDF files to a PDF on Linux?

convert seems works not very well when merging PDFs. The quality is low. Any other better methods to merge multiple PDF files to a single PDF on Linux?

ghostscript works the best for me on merging PDFs:

gs -q -sPAPERSIZE=letter -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -dPDFSETTINGS=/prepress 
-sOutputFile=out.pdf in1.pdf in2.pdf in3.pdf

merges in{1..3}.pdf to out.pdf.

Answered by Eric Z Ma.

Eric Z Ma

Eric is a father and systems guy. Eric is interested in building high-performance and scalable distributed systems and related technologies. The views or opinions expressed here are solely Eric's own and do not necessarily represent those of any third parties.

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