本文介绍，在Linux环境下用lsof查询端口占用

操作环境说明

操作环境为 Ubuntu 22.04.2 LTS, 原则上只要有lsof命令即可。

root@ubuntu:~# lsb_release -a

No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 22.04.2 LTS
Release:	22.04
Codename:	jammy

查询命令

假定查询端口 8091 端口占用情况

lsof -i :8091

COMMAND  PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
nginx    776     root    6u  IPv4  28929      0t0  TCP *:8091 (LISTEN)
nginx    776     root    7u  IPv6  28930      0t0  TCP *:8091 (LISTEN)
nginx   1840 www-data    6u  IPv4  28929      0t0  TCP *:8091 (LISTEN)
nginx   1840 www-data    7u  IPv6  28930      0t0  TCP *:8091 (LISTEN)
nginx   1841 www-data    6u  IPv4  28929      0t0  TCP *:8091 (LISTEN)
nginx   1841 www-data    7u  IPv6  28930      0t0  TCP *:8091 (LISTEN)

或
apt update
apt install net-tools -y

netstat -tunlp|grep 8091  
tcp        0      0 0.0.0.0:8091            0.0.0.0:*               LISTEN      776/nginx: master p 
tcp6       0      0 :::8091                 :::*                    LISTEN      776/nginx: master p