From: "Christopher D." Date: 2012-04-27T05:07:20+09:00 Subject: running a command line argument from rudy Straight up. I have to use windows @ work but I still require some guidance. I'm looking to append some pdfs. Pdftk (http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/) works in the cmd prompt. Lets say I have 01_cool.pdf 02_cool.pdf If I'm in cmd I can type > pdftk *.pdf cat output combined.pdf #=> A new file called combined.pdf which is the concatenation of the two pdfs I need to be able to run this in ruby because I would like to eventually append all files that have the same names in two directories and put it into one final directory. As a test this is the code I came up with. pdfs = Dir["*.pdf"].sort.join(" ") `pdftk #{pdfs} cat output combined.pdf` Which results in an error: "No file or directory -pdftk ["01_cool.pdf", "02_cool.pdf"] cat output combined.pdf -- Posted via http://www.ruby-forum.com/.