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I got a CD of JPG files from a photographer. Some of the files are not readable on my Ubuntu machine (they show up as X icons in the Nautilus file browser). I figured out that the reason is that they are not "world-readable" (and also not "group-readable") and they are owned by a user that does not exist on my machine. I am able to work around it by doing

sudo nautilus

Is there any easier way to do this? I am thinking some setting I can make on my system relating to the CD driver works?

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Passing the norock option to mount will disable Rock Ridge extensions and suppress the permissions recorded on the disc.

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cool... how do I change that in the boot sequence? – JoelFan Aug 31 '10 at 14:32
@JoelFan: You don't need to change the boot sequence, simply remount the drive with the norock option. Simply look through the first bit of the mount manpage. (man mount) – Hello71 Aug 31 '10 at 14:44
@Hello71, I want it to mount the CD drive like that automatically when it boots. Otherwise I have to remount it manually each time – JoelFan Aug 31 '10 at 22:34
No, you don't. Mount it once, copy the files off it, throw the disc in the circular file, then slap the photographer. – Ignacio Vazquez-Abrams Aug 31 '10 at 23:06
@Ignacio, do you have any idea how they ended up that way? Only some of the images, not all! The photographer uses a Mac in case that sheds any light. – JoelFan Sep 1 '10 at 1:23
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Here are the commands to mount "norock":

me@desktop:~$ mount | grep cdrom  # find out the device and mount point
/dev/sr0 on /media/cdrom0 type udf (ro,nosuid,nodev,utf8,user=me)
me@desktop:~$ sudo umount /media/cdrom0 # unmount the mount point
me@desktop:~$ sudo mount -t iso9660 -o norock /dev/sr0 /media/cdrom0 # mount with "norock"
mount: block device /dev/sr0 is write-protected, mounting read-only
me@desktop:~$
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