I wanted to remove a CD from my computer. I pressed the eject button, it didn't work. I right-clicked the CD icon and select 'Unmount' or 'Eject', it didn't work.
So, I tried to open the terminal and run this command 'umount -l /media/cdrom'..and it worked!
What is -l option? According to man page:
Lazy unmount. Detach the filesystem from the filesystem hierarchy
now, and cleanup all references to the filesystem as soon as
it is not busy anymore. (Requires kernel 2.4.11 or later.)
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