Command:

Explanation:

• sudo: Runs the command with superuser privileges, as unmounting a filesystem typically requires root access.
• umount: The command used to unmount a filesystem from a mount point.
• /path/to/mount_point: The directory where the filesystem is currently mounted. Replace this with the actual path of the mount point you wish to unmount (e.g., /mnt/data, /media/usb).

Example:

To unmount the filesystem that is mounted at /mnt/data, you would use the following command:

Result:

This command will unmount the filesystem from /mnt/data, making the data no longer accessible at that location until it is mounted again.

Additional Notes:

• If the mount point is in use (e.g., a file within the filesystem is open or in use), you may receive a “device is busy” error. In such cases, you can use the lsof or fuser commands to check which processes are using the mount point:
  bash

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  lsof /mnt/data


  or

  bash

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  fuser -m /mnt/data

• To force the unmounting (use cautiously), you can add the -f flag:
  bash

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  sudo umount -f /mnt/data