#!/bin/bash
tmpdir="$(mktemp -d)"
mount -t tmpfs -o size=10M tmpfs "$tmpdir"
dd if=/dev/zero of="$tmpdir"/fs.image bs=1024 count=$[1024*5]
losetup /dev/loop0 "$tmpdir"/fs.image
umount "$tmpdir"
fuser -a "$tmpdir"
lsof "$tmpdir"