Linux/dev/Loop

In Linux,/dev/loop is often used to create the file system image file rootfs. IMG, so that it can be downloaded to the kernel for mounting;

Http://zh.wikipedia.org/wiki//dev/loop

We have daily access to a large number of image files *. ISO, which use data files to store data on actual block devices;

First of all, you must make it clear that you need a specific file system to store files on devices such as CDs, hard disks, and floppy disks.

There is a large amount of specific information in the file system used to manage the above files, the information and file data together constitute a File System

So the image file is the sum of these contents.

After the image file is created, it can be stored on the storage device as a file, so how to access it as a file system

What about all the files contained? This requires the image file to be treated as a block device. At this time,/dev/Loop

The debut is coming soon. Depending on/dev/loop, you can treat the image file on the OS as a block device. The following is an example:

First, use losetup to connect the image file with/dev/loop.

losetup /dev/loop0 example.img

Then, mount the loop device to a directory, so that the contents of the image file are displayed in the directory.

mount /dev/loop0 /home/you/dir

Or directly use mount to implement:

mount -o loop example.img /home/you/dir