You are probably all experienced with the situation – you are trying to unmount a drive, but keep getting told by your system that it’s busy. If you like to find which application hold the drive busy there is one simple solution. A quick one-line in terminal mode will tell you (in this example device name is “windows”):

lsof +D /mnt/windows

This will return the command and process ID of any tasks currently accessing the /mnt/windows directory. You can then locate them, or use the kill command to finish them off.

Tags | Howto, Linux, Tips and Tricks, Ubuntu