Raspbian "/etc/.fstab" file?

Probably a working copy or backup copy made by some part of the installer or an admin program.

That seems to be the case. It exactly matches the /etc/fstab on the original Raspbian image that I downloaded, so it must have done by the installer. Thanks.

This was also a useful opportunity to figure out how to mount one partition of the img file using the loopback. In my case:

$ sudo fdisk -l 2015-05-05-raspbian-wheezy.img

Disk 2015-05-05-raspbian-wheezy.img: 3.1 GiB, 3276800000 bytes, 6400000 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xa6202af7

Device Boot Start End Sectors Size Id Type

$ sudo losetup -f --show -o $((122880 * 512)) 2015-05-05-raspbian-wheezy.img

I got the idea from here:

Just posting that in case anyone else cares!