lsfd

List open files and the corresponding processes in Linux. More information: https://manned.org/lsfd.

• List all open file descriptors:

lsfd

• List all files kept open by a specific program:

lsfd -Q|–filter 'PID == process_ID'

• Check what program has a specific file open:

lsfd -Q|–filter "NAME == '/path/to/file'"

• List open IPv4 or IPv6 sockets:

lsfd -i4|6