Linux:software: How to merge multiple pdf files into one

Use the command in Linux to merge some PDF files into one:

gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=firstANDsecond.pdf -dBATCH first.pdf second.pdf

Use it, you have two packages installed in your system

Link: Ghostscript download
Link: PDFtk download

For more information, see the reference link: http://www.newlinuxuser.com/merge-multiple-pdfs-into-one-file/