Originally Posted by M$ISBS
So fstab is not located in /etc it is in /mnt/etc ? when booting from install disk?
Exactly. The install disk, as with any "LiveCD", creates a virtual filesystem in RAM. When you turn off your computer, everything there disappears. In order to access a hard drive, you need to mount it.
So, when you boot the install disk and run setup, one of the first things you do is set up your target partitions. This does two things, it helps create your fstab and it also mounts those partitions under /mnt. If you want to see it happen, run setup and go through the steps up to setting up the target partitions but exit setup prior to actually installing anything. Then type "ls /mnt". You will see a full root filesystem under /mnt, and that is your actual harddrive filesystem.
Those are the real files that you need to edit. Depending on the changes you need to make, eg. if you need to edit lilo, you may enter the command "chroot /mnt". This makes the system consider /mnt to be the root filesystem rather than / which is a "virtual" filesystem.
I hope this is not too confusing.