Umount

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The unmount command is used to unlink a file system from the local host, usually a file system previously linked using the mount command.

Typically the unmount command is used to release a CD or DVD-ROM drive so that it can be ejected, allow a USB memory key to be cleanly unmounted before unplugging it (Microsoft Windows has a similar function to safely remove devices) or any other file system linked to the local host.

See also: mount, etc/fstab