Mordikan

An equally valid question is why does a glorified scheduling service want to act as my UEFI boot manager?

bchunk can do conversion to build these all out as .iso files. I think cdemu, given your mention of Daemon Tools, is a better option though as its effectively doing the same thing DT did. It would load the image to /dev/sr0 (the CD/DVD device) which you would then just run the previous mount command to bring up: sudo mount /dev/sr0 /mnt/cd

I think you mean MDF/MDS instead of MKV (I haven’t seen those in like 20 years - but I think that’s what you mean). That was the old Alcohol 120% proprietary format. I don’t think any tools directly work with that extension, you’d have to convert those .iso first.

If the .img file does not contain partition table info, it should just be a matter of mounting:

sudo mkdir -p /mnt/img
sudo mount -o loop path/to/file.img /mnt/img

The only time that becomes a problem normally is if its like a partitioned SD card (had a netbook I booted from SD card before and that happened).