Now i have a prolem!
I double click on my zip file from cdrom.
System can not read my zip file and i can not eject my cdrom.
How can i manage process and can i end a process
or how can i eject my cdrom?
please have me! thanks
Some addtional info as to which O/S and hardware you are using would be useful. There is probably a simple drop down or other menu "eject". But there is also the old manual standby. On the front of your CD drive there is likely a small hole just big enough to insert a straigtened paperclip. Insert and push gently but firmly and a CD will eject.
Ok! Thanks
I think, that is only way
But i want to know which process is running on with my file on cdrom
and i can kill it!
Too many process, i don't know so i'm shutdown system and eject my cd.
it take a long time to restart server! 
There is a command "eject", which will eject the CD-ROM from the drive. If you want to know which processes are using your drive use "fuser": "fuser -k /dev/cd0" should kill all processes which are still using the drive.
Still the most common reason for the drive not opening is a forgotten "umount", so you should first try a "umount /dev/cdrom" and only then resort to fuser.
I hope this helps.
bakunin
Thia is what i should have told him but it seems he has already gone for the paper clip.