eject —
eject a floppy disk, cdrom or tape
  
    | eject | [ -fv] [-l|-L|-U]
      [-tdevice-type]
      [-d] device | 
The eject program ejects a medium from the specified
  device. It can also load a cdrom in the drive if this operation is supported
  by the hardware. The device argument specifies a device
  either by its full path name (identified by a /dev/
  prefix), or by one of the built-in nicknames. If the medium contains a file
  system that is currently mounted, eject will attempt
  to unmount the file system before ejecting.
The following options are available:
  - -d
- Deprecated.
- -f
- Force the eject operation without attempting to unmount any file systems
      first.
- -l
- Load media in the drive (only supported for the cdrom device type).
- -L
- Lock the media into the drive (but see BUGS
      below).
- -n
- List the built-in nicknames on standard output.
- -tdevice-type
- Specify the device type. The argument must be one of
      diskette, floppy,
      cdrom, disk, or
      tape. This option is necessary when ejecting a device
      for which no built-in knowledge is available.
- -U
- Unlock the media from the drive.
- -v
- Display some of the actions taken on standard output.
Most disk drivers automatically lock the media on the first open and unlock it
  on the last close, making
  ‘eject
  -L