View the content of an iso file

isoinfo is a command that provides a lot of information regarding an iso file.

 sudo apt install genisoimage

A quick view of help :

 isoinfo --help
isoinfo: Usage: isoinfo [options] -i filename
Options:
        -help,-h        Print this help
        -version        Print version info and exit
        -debug          Print additional debug info
        -d              Print information from the primary volume descriptor
        -f              Generate output similar to 'find .  -print'
        -J              Print information from Joliet extensions
        -j charset      Use charset to display Joliet file names
        -l              Generate output similar to 'ls -lR'
        -p              Print Path Table
        -R              Print information from Rock Ridge extensions
        -s              Print file size infos in multiples of sector size (2048 bytes).
        -N sector       Sector number where ISO image should start on CD
        -T sector       Sector number where actual session starts on CD
        -i filename     Filename to read ISO-9660 image from
        dev=target      SCSI target to use as CD/DVD-Recorder
        -x pathname     Extract specified file to stdout

To check the list of folders in an .iso file:

   isoinfo -l -i /path/to/iso

to check a specific file in an .iso:

    isoinfo -i /path/to/iso -x "nom_fichier"