Instead of purchasing iso making software, one can easily add files to an iso in linux. It involves using the “mkisofs” command. To add your files to an iso simply do
mkisofs -o file.iso file
This command can also be used to add a directory to an iso. To do this perform the command with the -R option and the directory:
mkisofs -R -o directory.iso directory
This ISO can then be burned to a CD, or mounted via virtual media.