Making ISO image files

To make an ISO image file to be burned to a CD or DVD later execute the following command

mkisofs -graft-points -U -r -o filename.iso -path-list pathlist.file

where the following flags -U -r give more flexibility in naming files and permissions
and -o refers to the output file name filename.iso
and -path-list refers to the file pathlist.file that contains the list of files to be included in the image file.  pathlist.file should look something like

pathOnISO1=/path/to/file1
pathOnISO2=/path/to/file2

and the flag -graft-points allows the files written to the image to graft in at specific folder levels