$ fuser -V
$ fuser

View Processes Running in a Directory

$ fuser -v .

Find Processes Using Network Sockets

$ fuser -v -n tcp 8000

$ fuser /path/to/file
$ fuser -n tcp 80
$ fuser -k /path/to/file
$ fuser -ki -n tcp 8080
$ fuser -u /path/to/file
$ fuser -m /mnt/my_mount
$ fuser -v /path/to/file