How to eject a CD/DVD from the command line

I've just right clicked on the DVD icon in the Unity Launcher in order to eject it, but instead of hitting the 'Eject' button, I missed and hit the 'Unlock from Launchpad' option instead.

How do I go about ejecting the disk from the drive now that the Launcher option is missing?

In order to eject a disk from the drive, whether it's a CD or a DVD, open a terminal and simply execute the eject command.

To open the CD drive / eject the CD:

• Open Terminal using Ctrl+Alt+T, and type eject
• To close the tray, type eject -t
• And to toggle (if open, close and if closed, open) type eject -T

All these commands can be typed into the run dialogue (Alt+F2)

For more options, type eject -h into Terminal.

Opening the Tray

Commands:

• open tray: eject
• close tray: eject -t

Easy Function for .bashrc

alias opentray='eject'

A few issues arise when ejecting drives. Sometimes they don't want to eject, because they are mounted etc. You can override this with eject -l /media/mountpoint or (/mnt/mountpoint). I wrote a function that can be called by simply typing opentray on your command line.

Notice

This works only if

• you setup a permanent mount point for your drive /dev/sr0 (same thing as /dev/cdrom, which is just symbolically linked to /dev/sr0)
• your mount point is automatically created when you insert a disk into the drive. (This can be ignored if you remove/comment out all lines where rm -r "${mountdir}" exists that way the mount point will never be removed automatically)
• Must run as root unless you changed the permissions manually of mounting functions (I have never tried this)

function opentray ()
{
    mountdir="/media/DVD"
    if [ -d "${mountdir}" ] # If directory ${mountdir} exists
    then
        if [ $(mount | grep -c "${mountdir}") = 1 ] # If drive is mounted, then
        then
            echo "/dev/sr0 is now mounted to ${mountdir}. I'll try to unmount it first and eject/open the tray."
            umount -l "${mountdir}"
            rm -r "${mountdir}"
            sysctl -w dev.cdrom.autoclose=0 # Ensure drive doesn't auto pull tray back in.  
            eject
            exit
        else
            echo "/dev/sr0 is not mounted. Opening the tray should be easy. Ejecting/opening now."
            rm -r "${mountdir}"
            sysctl -w dev.cdrom.autoclose=0 # Ensure drive doesn't auto pull tray back in.  
            eject
            exit
        fi
    else
        echo 'The directory "${mountdir}" does not exist. Ejecting/opening the tray.'
        sysctl -w dev.cdrom.autoclose=0 # Ensure drive doesn't auto pull tray back in.
        eject
        exit
    fi
}

Closing the Tray

For completeness, you can add this alias to your .bashrc ( or .bash_aliases file) to pull the tray back in from the command line. You do not need to be root.

alias closetray='eject -t'