title: Lsof date: 2021-02-05 16:12:47 background: bg-blue-400 tags: - port - processes - utility categories: - Linux Command intro: |

This quick reference cheat sheet provides various for using lsof command.

Getting Started

Introduction

lsof meaning LiSt Open Files is used to find out which files are open by which process

$ lsof
$ sudo lsof -u root

Port-specific

$ lsof -i :8080
$ lsof -i :80 -i :22
$ lsof -i TCP:22
$ lsof -i TCP:1-1024
$ lsof -i UDP
$ lsof -i @192.168.1.5

Process-specific

$ lsof -c mysql
$ lsof -c java
$ lsof -c ssh
$ lsof -c nginx
$ lsof -c ssh -c httpd

User-specific

$ lsof -u www-data
$ lsof -u www-data -u ubuntu
$ lsof -i -u ^root # Except certain user

Network-specific

$ lsof -i 4   # IPv4 only
$ lsof -i 6   # IPv6 only

PID-specific

$ lsof -p 1753
$ lsof -p ^3  # Except certain pids

Filename-specific

$ lsof /var/log/messages
$ lsof /etc/passwd

Directory-specific

$ lsof +D /var/log # Within a directory

Kill

$ kill -9 `lsof -t -u apache`
$ kill -9 $(lsof -t -i :8080)