Command-line tool

lsof

brew/lsof

Checked 25 Oct 2026, 21:09 UTC · Listing refreshed from Homebrew, winget, npm, Scoop and cargo; npm packages checked against OSV.dev

Utility to list open files

Website Source

At a glance

Type

Command-line tool

Install on

macOS, Linux

Last checked

25 Oct 2026, 21:09 UTC

Install it

macOS

brew install lsof

Linux

brew install lsof

Find the processes that have a given file open

lsof path/to/file

Find the process that opened a local internet port

lsof -i :port

Only output the process ID (PID)

lsof -t path/to/file

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