fuser

Display process IDs currently using files or sockets. More information: https://manned.org/fuser.

• Find which processes are accessing a file or directory:

fuser {{path/to/file_or_directory}}

• Show more fields (USER, PID, ACCESS and COMMAND):

fuser --verbose {{path/to/file_or_directory}}

• Identify processes using a TCP socket:

fuser --namespace tcp {{port}}

• Kill all processes accessing a file or directory (sends the SIGKILL signal):

fuser --kill {{path/to/file_or_directory}}

• Find which processes are accessing the filesystem containing a specific file or directory:

fuser --mount {{path/to/file_or_directory}}

• Kill all processes with a TCP connection on a specific port:

fuser --kill {{port}}/tcp