Concatenation / joining of multiple PDF files in linux Multiple files are easy to concatenate / join in linux terminal. ===================================== Easy command to join pdf files: pdfjam file1.pdf file2.pdf file3.pdf --outfile combinedfile.pdf ===================================== pdfjam is a shell-script front end to the LaTeX 'pdfpages' package (for which, see http://www.ctan.org/tex-archive/macros/latex/contrib/pdfpages). Usage: pdfjam [OPTIONS] [--] [FILE1 [SEL1]] [FILE2 [SEL2]] ... where * 'FILE1' etc. are PDF files (JPG and PNG files are also allowed). For input from /dev/stdin, use the special name '/dev/stdin' in place of any of FILE1, FILE2, etc: this can be mixed with 'real' files as needed, to allow input through a pipe (note that if /dev/stdin is connected to tty, an error results). If 'FILE1' is absent, pdfjam will use '/dev/stdin' (and will use '-' for the page sel...