How to Unmount in Linux

In Linux, the umount command can be used to unmount a mounted file system. The basic syntax of umount is as follows:

umount [选项] <挂载点>

For example, to unmount a file system mounted under the /mnt directory, you can use the following command:

umount /mnt

Before using the umount command, make sure that the target mount point is not being used by other programs, as it will result in a “device is busy” error. If you are unable to unmount the target mount point, you can use the fuser command to find and close any programs using that directory, and then try to unmount it again.