Open Files

Filesystem

File

lsof <file>

Directory

lsof +d <directory>

Recursive directory

lsof +D <directory>

Command

lsof -c <command>

User

lsof -u <user>

PID

lsof -p <pid>

Multiple argument

lsof -d <directory> -a -c <command>

Network

Internet protocol

lsof -i 4

lsof -i 6

Port connection

lsof -Pi :<port>

Network address

lsof -Pni :<port>

IP address connection

lsof -Pni @127.0.0.1

Multiple argument

lsof -c <command> -a -Pni