Quickly concatenating PDF files with teTeX utilities (See related posts)

Using utilities from the standard teTeX distribution, it's possible to quickly and easily concatenate multiple pdfs together from the command line.

To concatenate 1.pdf, 2.pdf, 3.pdf into a single file 123.pdf you can use the command

texexec --pdfarrange --result 123.pdf 1.pdf 2.pdf 3.pdf

To concatenate all pdf files in a directory into a single file all.pdf you can use

texexec --pdfarrange --result all.pdf *.pdf