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           eject [options] device|mountpoint


           Eject  allows  removable  media (typically a CD-ROM, floppy disk, tape,
           JAZ, ZIP or USB disk) to be ejected under software control.   The  com-
           mand  can  also control some multi-disc CD-ROM changers, the auto-eject
           feature supported by some devices, and close the disc tray of some  CD-
           ROM drives.
           The  device  corresponding  to  device or mountpoint is ejected.  If no
           name is specified, the default name /dev/cdrom is used. The device  may
           be   addressed   by   device  name  (e.g.  'sda'),  device  path  (e.g.
           '/dev/sda'), UUID=<uuid> or LABEL=<label> tags.
           There are four different methods of ejecting, depending on whether  the
           device is a CD-ROM, SCSI device, removable floppy, or tape.  By default
           eject tries all four methods in order until it succeeds.
           If device partition is specified, the whole-disk device  is  used.   If
           the  device or a device partition is currently mounted, it is unmounted
           before ejecting.


           -a, --auto on|off
                  This option controls the  auto-eject  mode,  supported  by  some
                  devices.   When enabled, the drive automatically ejects when the
                  device is closed.
           -c, --changerslot slot
                  With this option a CD slot can be selected from an ATAPI/IDE CD-
                  ROM  changer.   Linux 2.0 or higher is required to use this fea-
                  ture. The CD-ROM drive can not be in use  (mounted  data  CD  or
                  playing  a  music CD) for a change request to work.  Please also
                  note that the first slot of the changer is referred to as 0, not
           -d, --default
                  List the default device name.
           -f, --floppy
                  This  option  specifies that the drive should be ejected using a
                  removable floppy disk eject command.
           -F, --force
                  Force eject, don't check device type.
           -h, --help
                  Display help text and exit.
           -i, --manualeject on|off
                  This option controls locking of the hardware eject button.  When
                  The option tells eject to not try to unmount at all.
           -M, --no-partitions-unmount
                  The option tells eject to not try to unmount another  partitions
                  on partitioned devices. If another partition is mounted the pro-
                  gram will not attempt to eject the media.  It  will  attempt  to
                  unmount only mountpoint or mounted device given on eject command
           -n, --noop
                  With this option the selected device is displayed but no  action
                  is performed.
           -t, --trayclose
                  With this option the drive is given a CD-ROM tray close command.
                  Not all devices support this command.
           -T, --traytoggle
                  With this option the drive is given a CD-ROM tray close  command
                  if  it's opened, and a CD-ROM tray eject command if it's closed.
                  Not all devices support this command, because it uses the  above
                  CD-ROM tray close command.
           -r, --cdrom
                  This  option  specifies that the drive should be ejected using a
                  CDROM eject command.
           -s, --scsi
                  This option specifies that the drive  should  be  ejected  using
                  SCSI commands.
           -v, --verbose
                  Run  in  verbose  mode; more information is displayed about what
                  the command is doing.
           -V, --version
                  Display version information and exit.
           -x, --cdspeed <speed>
                  With this option the drive is given a CD-ROM select  speed  com-
                  mand.   The  speed  argument  is a number indicating the desired
                  speed (e.g. 8 for 8X speed), or 0 for maximum  data  rate.   Not
                  all devices support this command and you can only specify speeds
                  that the drive is capable of.  Every time the media  is  changed
                  this  option is cleared.  This option can be used alone, or with
                  the -t and -c options.
           -X, --listspeed
                  With this option the CD-ROM drive will be probed to  detect  the
                  available  speeds.   The output is a list of speeds which can be
                  used as an argument of the -x  option.   This  only  works  with
                  Linux  2.6.13 or higher, on previous versions solely the maximum
           Macintosh systems.  If eject does not work, it is most likely a limita-
           tion  of  the  kernel  driver  for the device and not the eject program
           The -r, -s, -f, and -q options allow controlling which methods are used
           to  eject.   More  than  one method can be specified.  If none of these
           options are specified, it tries all  four  (this  works  fine  in  most
           Eject  may  not  always  be  able to determine if the device is mounted
           (e.g. if it has several names).  If the device name is a symbolic link,
           eject will follow the link and use the device that it points to.
           If  eject  determines  that the device can have multiple partitions, it
           will attempt to unmount all mounted partitions  of  the  device  before
           ejecting  (see  --no-partitions-unmount). If an unmount fails, the pro-
           gram will not attempt to eject the media.
           You can eject an audio CD.  Some CD-ROM drives will refuse to open  the
           tray if the drive is empty.  Some devices do not support the tray close
           If the auto-eject feature is enabled, then the  drive  will  always  be
           ejected  after  running  this  command.   Not  all  Linux kernel CD-ROM
           drivers support the auto-eject mode.  There is no way to find  out  the
           state of the auto-eject mode.
           You need appropriate privileges to access the device files.  Running as
           root is required to eject some devices (e.g. SCSI devices).


           Jeff Tranter - original author.
           Karel Zak and Michal Luscon - util-linux version.


           lsblk(8), findmnt(8), mount(8), umount(8)


           The eject command is part of the util-linux package  and  is  available
           from Linux Kernel Archive

    Linux April 2012 EJECT(1)


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