Linux/Unix Command: Eject

Eject removable media under software control

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NAME: eject - eject removable media


eject -h eject [-vnrsfqp] [] eject [-vn] -d eject [-vn] -a on|off|1|0 [] eject [-vn] -c slot [] eject [-vn] -t [] eject [-vn] -x [] eject -V


Eject allows removable media (typically a CD-ROM, floppy disk, tape, or JAZ or ZIP 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 is ejected. The name can be a device file or mount point, either a full path or with the leading "/dev" or "/mnt" omitted. If no name is specified, the default name "cdrom" is used.

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 the device is currently mounted, it is unmounted before ejecting.

Command-Line Options


This option causes eject to display a brief description of the command options.


This makes eject run in verbose mode; more information is displayed about what the command is doing.


If invoked with this option, eject lists the default device name.

-a on|1|off|0

This option controls the auto-eject mode, supported by some devices. When enabled, the drive automatically ejects when the device is closed.


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 feature. 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.


With this option the drive is given a CD-ROM tray close command. Not all devices support this command.


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.


With this option the selected device is displayed but no action is performed.


This option specifies that the drive should be ejected using a CDROM eject command.

-s This option specifies that the drive should be ejected using SCSI commands.


This option specifies that the drive should be ejected using a removable floppy disk eject command.


This option specifies that the drive should be ejected using a tape drive offline command.


This option allow you to use /proc/mounts instead /etc/mtab. It also passes the -n option to umount(1).


This option causes eject to display the program version and exit.


All options have corresponding long names, as listed below. The long names can be abbreviated as long as they are unique.

-h --help -v --verbose -d --default -a --auto -c --changerslot -t --trayclose -x --cdspeed -n --noop -r --cdrom -s --scsi -f --floppy -q --tape -V --version -p --proc 


Eject the default device:

  • eject

Eject a device or mount point named cdrom:

  • eject cdrom

Eject using device name:

  • eject /dev/cdrom

Eject using mount point:

  • eject /mnt/cdrom/

Eject 4th IDE device:

  • eject hdd

Eject first SCSI device:

  • eject sda

Eject using SCSI partition name (e.g. a ZIP drive):

  • eject sda4

Select 5th disc on mult-disc changer:

  • eject -v -c5 /dev/cdrom

Turn on auto-eject on a SoundBlaster CD-ROM drive:

  • eject -a on /dev/sbpcd

Exit Status

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

Use the man command (% man) to see how a command is used on your particular computer.