本文转载自：https://blog.csdn.net/cryhelyxx/article/details/43228423

1. 问题描述

在centos下, 无法使用命令lsof, 出现以下信息:

# lsof -i:3690
-bash: lsof: command not found

2. 解决方法

我们可以通过yum来安装:

# yum install lsof

本人操作如下:

# yum install lsof
Loaded plugins: fastestmirror
Setting up Install Process
Loading mirror speeds from cached hostfile
 * base: mirrors.163.com
 * epel: ftp.cuhk.edu.hk
 * extras: mirrors.aliyun.com
 * updates: mirrors.163.com
Resolving Dependencies
--> Running transaction check
---> Package lsof.x86_64 0:4.82-4.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package         Arch              Version                Repository       Size
================================================================================
Installing:
 lsof            x86_64            4.82-4.el6             base            319 k

Transaction Summary
================================================================================
Install       1 Package(s)

Total download size: 319 k
Installed size: 890 k
Is this ok [y/N]: y
Downloading Packages:
lsof-4.82-4.el6.x86_64.rpm                               | 319 kB     00:00     
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : lsof-4.82-4.el6.x86_64                                       1/1 
  Verifying  : lsof-4.82-4.el6.x86_64                                       1/1 

Installed:
  lsof.x86_64 0:4.82-4.el6                                                      

Complete!

3. lsof 的常用几个命令

lsof -i:(端口号)

如, 

lsof -i:3306         (3306默认是mysql服务端的端口)

lsof -i:3690         (3690默认是svn服务端的端口)

OK, Enjoy it!!!