Mounting file as filesystem

Linux provide various and flexible file system for user to choose.

Here are an example

Create empty 10 Mb file.

#dd if=/dev/zero of=file.img bs=1k count=10000

Attach the file to loopback file system

#losetup /dev/loop0 file.img

Create file system on loopback device

#mke2fs -c /dev/loop0 10000

Mount loopback device

#mount -t ext2 /dev/loop0 /mnt/point1

So you can have any file system on any file system.

To find out more detail about file system please visit the following links :

-Anatomy of file system

http://www.ibm.com/developerworks/linux/library/l-linux-filesystem/

-Cryptographic File Systems Performance

http://www.fsl.cs.sunysb.edu/docs/nc-perf/index.html

-Loopback Tricks

http://nst.sourceforge.net/nst/docs/user/ch04s04.html#filesystem.loopback