eject(1) — Linux manual page


EJECT(1)                      User Commands                     EJECT(1)

NAME         top

       eject - eject removable media

       eject [options] device|mountpoint

DESCRIPTION         top

       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

       If a device partition is specified, the whole-disk device is

       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.

OPTIONS         top

       -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

       -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.

EXIT STATUS         top

       Returns 0 if operation was successful, 1 if operation failed or
       command syntax was not valid.

NOTES         top

       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

AUTHORS         top

       Jeff Tranter <tranter@pobox.com> - original author, Karel Zak
       <kzak@redhat.com> and Michal Luscon <mluscon@redhat.com> -
       util-linux version.

SEE ALSO         top

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

REPORTING BUGS         top

       For bug reports, use the issue tracker at

AVAILABILITY         top

       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
       2023-12-22. (At that time, the date of the most recent commit
       that was found in the repository was 2023-12-14.) 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 2.39.594-1e0ad      2023-07-19                       EJECT(1)