Ever try to unmount a drive and it came back with Device is busy even with umount -f? Well that is because a process is still accessing that drive. Use the following commands to find out which process that is and kill it so you can safely unmount your drive!
- lsof (device) ex: lsof /dev/cdrom
- kill -9 (pid)
If you are confused you can run this: lsof -t ‘device here’ | xargs kill -9 . Just make sure you put the device in. After that command you should be able to unmount the drive.
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If you were to translate that command to english.. how would you say it.
Would “|” mean then?
So you do the first part.. and THEN the second part?
the | means do this command after that command
The | is actually a pipe tool used in linux. It pipes the output of the first command and sends it to the preceding command. Eg.
ls -lR /home/* | grep *.pdf
This will list all the pdf files in the home directory.