`lsof` command

List open files and the processes that hold them, including network ports.

Processes & services
Package lsof
6 options · 5 examples

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Syntax
Common options
Examples
Related commands

Syntax

lsof [options]

Provided by the lsof package. Run man lsof for the full manual.

Common options

Option	What it does
`-i :PORT`	Processes using a port
`-i TCP`	TCP connections
`-u USER`	Files a user has open
`-p PID`	Files a process has open
`-t`	Print PIDs only
`+D DIR`	Open files under a directory

Examples

What is using port 8080
```
sudo lsof -i :8080
```
PIDs only (for kill)
```
sudo lsof -t -i :8080
```
Open files of a process
```
sudo lsof -p 1234
```
Who has a file open
```
sudo lsof /var/log/syslog
```
Deleted files still taking space
```
sudo lsof | grep deleted
```

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