lsfd

lists information about files opened by running processes on Linux

TLDR

List all open files

$ lsfd

List files by process ID

$ lsfd -Q 'PID == [pid]'

Find process with file open

$ lsfd -Q "NAME == '[path/to/file]'"

List IPv4 sockets

$ lsfd -i4

List IPv6 sockets

$ lsfd -i6

Display help

$ lsfd --help

SYNOPSIS

lsfd [options]

DESCRIPTION

lsfd lists information about files opened by running processes on Linux. It is a modern replacement for lsof with better performance and filtering capabilities using a SQL-like query language.

PARAMETERS

-Q, --filter EXPR

Filter output with expression

-i4

Show IPv4 sockets only

-i6

Show IPv6 sockets only

-o, --output COLUMNS

Specify output columns

-J, --json

Output in JSON format

-n, --noheadings

Suppress column headers

-h, --help

Display help information

CAVEATS

Part of util-linux package. Requires Linux 5.12+ for full functionality. Filter syntax differs from lsof.