Ubuntu how to mount NTFC exception

Error message

# mount /dev/sdb1 /mnt/usb
Mount is denied because the NTFS volume is already exclusively opened.
The volume may be already mounted, or another software may use it which
could be identified for example by the help of the 'fuser' command.

The problem encountered, there are processes occupying the hard disk, we need to find the process and kill

 

View progress

# fuser -m -u /dev/sdb1
/dev/sdb1:            1977(root)

end process

# kill 1977

Remount once

# mount /dev/sdb1 /mnt/usb