[SOLVED]Forcing a Device to Unmount

5:58 26/04/2015
Kich ban:
root@srv:/# umount /opt
umount: /opt: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))
       
#FORCING A DEVICE:
root@srv:/# umount -l /opt

DONE