1

I created a folder and I did:

chmod 777 anotherFolder/

I ran:

sudo mount -o loop folder/isoImage.iso anotherFolder/

The permissions of anotherFolder/ changed to "Read Only" and I can not chmod it back to 777, even with sudo. How can I chmod it to 777 ? It outputs me: Read Only File System.

I checked during 2 days in several forums but in vain :(

Aserre
  • 1,177

2 Answers2

2

ISO file is special file format called ISO 9660. Here is quote from wikipedia

Since ISO 9660 is by design a read-only, pre-mastered file system, all the data has to be written in one go or "session" to the medium.

So as a file system is read-only, you cannot mount it with write access.

But you can recreate ISO file, if you want.

  1. You should mount your *.iso file somewhere
  2. Then copy it to some temp folder
  3. Using mkisofs util create new ISO file.

Here is a little example:

sudo mount -o loop folder/isoImage.iso anotherFolder/
mkdir new_copy_of_iso
cp -R anotherFolder/* new_copy_of_iso/
umount anotherFolder
mkisofs -R -o name_new.iso new_copy_of_iso
c0rp
  • 10,010
1

Mounting an ISO file (a CD-ROM image) read-write is not possible. By nature, this is a read-only filesystem that has to be written in one go.

To alter the content of the ISO file, once mounted like you've done, you can copy the content to another directory, make your changes there and recreate the ISO file from there too. You can use the command mkisofs to create an ISO file from any directory structure or you can use the graphical tool integrated into Ubuntu (right-click on the CD-ROM icon appearing on your desktop when you insert a (blank) CD-ROM).

Benoit
  • 7,637