How to Unmount Cd Drive
I Am Returning to Ubuntu After Some Time So I Am a Bit Rusty. My Machine Is Running 16.04 Lts and I Want to Upgrade to the Current 18.04. I Have Downloaded...
I am returning to Ubuntu after some time so I am a bit rusty. My machine is running 16.04 LTS and I want to upgrade to the current 18.04. I have downloaded this and want to transfer it to a CD-R so that I can boot from that but I get an error message saying that the drive is already mounted. They problem is that I cannot remember how to un-mount it or find the instructions in the built-in help.
I could, I suppose, upgrade directly from the downloaded copy on the HD but I cannot remember how to do that either.
Thank you.
2 Answers
If you'd rather do it the graphical way, just launch Disks from the launcher. Click on your CD drive, and you'll see a square under where the partitions are. Click it, and you're done!
For the first drive use:
udisksctl unmount -b /dev/sr0
For the second drive:
udisksctl unmount -b /dev/sr1
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