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NAME | DESCRIPTION | OPTIONS | EXIT STATUS | NOTES | AUTHORS | SEE ALSO | REPORTING BUGS | AVAILABILITY |
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EJECT(1) User Commands EJECT(1)
eject - eject removable media
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 command 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 a 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. The eject is processed on exclusive
open block device file descriptor if --no-unmount or --force are
not specified.
-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. The CD-ROM drive cannot 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 1.
-d, --default
List the default device name.
-F, --force
Force eject, don’t check device type, don’t open device with
exclusive lock. The successful result may be false positive on
non hot-pluggable devices.
-f, --floppy
This option specifies that the drive should be ejected using a
removable floppy disk eject command.
-i, --manualeject on|off
This option controls locking of the hardware eject button.
When enabled, the drive will not be ejected when the button is
pressed. This is useful when you are carrying a laptop in a
bag or case and don’t want it to eject if the button is
inadvertently pressed.
-M, --no-partitions-unmount
The option tells eject to not try to unmount other partitions
on partitioned devices. If another partition is still mounted,
the program will not attempt to eject the media. It will
attempt to unmount only the device or mountpoint given on the
command line.
-m, --no-unmount
The option tells eject to not try to unmount at all. If this
option is not specified then eject opens the device with
O_EXCL flag to be sure that the device is not used (since
v2.35).
-n, --noop
With this option the selected device is displayed but no
action is performed.
-p, --proc
This option allows you to use /proc/mounts instead /etc/mtab.
It also passes the -n option to umount(8).
-q, --tape
This option specifies that the drive should be ejected using a
tape drive offline 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.
-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.
-t, --trayclose
With this option the drive is given a CD-ROM tray close
command. Not all devices support this command.
-h, --help
Display help text and exit.
-V, --version
Print version and exit.
-v, --verbose
Run in verbose mode; more information is displayed about what
the command is doing.
-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 speed will be reported. Also note that some drives may
not correctly report the speed and therefore this option does
not work with them.
-x, --cdspeed speed
With this option the drive is given a CD-ROM select speed
command. 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.
Returns 0 if operation was successful, 1 if operation failed or
command syntax was not valid.
eject only works with devices that support one or more of the four
methods of ejecting. This includes most CD-ROM drives (IDE, SCSI,
and proprietary), some SCSI tape drives, JAZ drives, ZIP drives
(parallel port, SCSI, and IDE versions), and LS120 removable
floppies. Users have also reported success with floppy drives on
Sun SPARC and Apple Macintosh systems. If eject does not work, it
is most likely a limitation of the kernel driver for the device
and not the eject program itself.
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 cases).
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 also --no-partitions-unmount). If an unmount
fails, the program 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 command.
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 <tranter@pobox.com> - original author, Karel Zak
<kzak@redhat.com> and Michal Luscon <mluscon@redhat.com> -
util-linux version.
findmnt(8), lsblk(8), mount(8), umount(8)
For bug reports, use the issue tracker
<https://github.com/util-linux/util-linux/issues>.
The eject command is part of the util-linux package which can be
downloaded from Linux Kernel Archive
<https://www.kernel.org/pub/linux/utils/util-linux/>. This page is
part of the util-linux (a random collection of Linux utilities)
project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
bug report for this manual page, send it to
util-linux@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
2025-02-02. (At that time, the date of the most recent commit that
was found in the repository was 2025-01-30.) If you discover any
rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page,
or you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a
mail to man-pages@man7.org
util-linux 2.41.devel-938-0a... 2025-01-15 EJECT(1)
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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