Easiest way to convert over 100 image formats to PDF is using ImageMagick. To install type in terminal: sudo apt-get install imagemagick Convert image to pdf: convert source.png target.pdf Merge all images in folder to one PDF file: convert *.jpg target.pdf For more info enter convert -man

If you want to convert .nrg file to .iso file you can use nrg2iso tool to create this. nrg2iso is a program that extracts ISO9660 data from Nero “.nrg” CD-ROM image files. Install nrg2iso in Ubuntu sudo apt-get install nrg2iso