Mount

The mount command mounts a storage device or file system, making it accessible and attaching it to an existing directory structure. This attached directory is called a mount point. In this way, users can access a storage device or filesystem just like a normal directory.

Remember to unmount after using, otherwise the file system is not fully synchonized, which will cause loss of data.

Steps

1. First, create a mount point:

   $ mkdir ~/rd

2. Then, we mount the disk to the mount point:

   $ sudo mount -t vfat -o loop test.disk ~/rd

3. After that, we can unmount the disk by:

   $ sudo umount ~/rd

How to solve device busy problem (Study by yourself)

There is the case where a process continously occupies the device such that you cannot unmount it.

In this case,we can make use of either one of the two commands to locate the process.

Method 1: lsof

$ lsof ~/rd

Method 2: fuser

$ fuser -vm ~/rd

By these two commands, you can know tail with PID 11793 is occupying the resource. By killing it usingkill -9, you can umount the resource successfully.