umount

Command Function

This command is used to unmount a specified file system.

Syntax

umount [-a [-t TYPE]] [dir]

Parameters

Table 1 Parameter description

Parameter

Description

Value Range

--help

Displays the parameters supported by the umount command.

N/A

-a

Unmounts all file systems mounted.

N/A

-t

Used together with the -a option to restrict the file systems specified by -a, allowing only the file system specified by -t to be unmounted.

N/A

dir

Specifies the directory from which the file system is to be unmounted.

Directory mounted with the file system

Usage

By specifying the dir parameter in the unmount command, you can unmount the specified file system from the directory.

Example

Run the following commands:

  • umount ./nfs
  • umount -a -t nfs

Output

unmount command output:

Example 1: unmounting the file system from ./nfs

OHOS:/$ umount ./nfs/
umount ok

Example 2: unmounting all NFS directories

OHOS:/$ umount -a -t nfs
umount ok