It may just be that on your system the device reference is something other than /dev/cdrom. Most Linux systems have /dev/cdrom as a symlink pointing at the first CD/DVD device, but yours may not. Depending on which IDE interface it's on, and whether its master or slave, it might be /dev/hdb, /dev/hdc or /dev/hdd. Of course there has to be a CD in the drive at the time.
By the way, you don't need to be root to run the command; you should be able to run it as a user.
I'm now thinking there is something wrong with this disk, Below is the disk (first line), Then I tried another Linux disk for something else.
[root@kitchen ~]# md5sum /dev/cdrom
md5sum: /dev/cdrom: Input/output error
[root@kitchen ~]# !!
md5sum /dev/cdrom
5f8e52583781bd74081dd90c970c6ea5 /dev/cdrom
[root@kitchen ~]#
I have use this first disk to do an install on two different computers and they have both got problems opening the same programs,
so that's what made me look at there checksums (even though K3b burner gave the correct sums
).
I think I will burn it again. ( I use x4 speed ).
Thanks ref Terminal 'user' .