notes on loopback filesystem

loopback.sh

### make loopback filesystem
exit

# must be superuser
sudo su

# write file.img - 10M
dd if=/dev/zero of=file.img bs=10M count=1

# make ext4 filesystem with file.img
mkfs.ext4 file.img

# create mount-point
mkdir /mnt/mount1

# mount it
mount -o loop file.img /mnt/mount1

# unmount it
umount /mnt/mount1