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Linux系统查看端口常用命令

發(fā)布時(shí)間：2024/6/21 综合教程 32 生活家

生活随笔收集整理的這篇文章主要介紹了 Linux系统查看端口常用命令小編覺(jué)得挺不錯(cuò)的,現(xiàn)在分享給大家,幫大家做個(gè)參考.

Linux系統(tǒng)查看端口常用命令：lsof和netstat。

lsof

lsof (list open files)是一個(gè)顯示系統(tǒng)當(dāng)前打開文件的工具。Linux系統(tǒng)的應(yīng)用程序都會(huì)有自己的文件描述符，通過(guò)文件描述符與操作系統(tǒng)進(jìn)行交互。可用此命令進(jìn)行系統(tǒng)監(jiān)控、網(wǎng)絡(luò)信息查看等，本文主要介紹端口相關(guān)操作。

安裝（CentOS）

有些系統(tǒng)需要手動(dòng)安裝：

[root@localhost ~]# yum install lsof

本機(jī)網(wǎng)絡(luò)端口使用情況

1.1 lsof -i
列舉當(dāng)前所有端口連接信息，輸出信息列表：

COMMAND	PID	USER	FD	TYPE	DEVICE	SIZE	NODE	NAME
進(jìn)程名稱	進(jìn)程標(biāo)識(shí)符	用戶	文件描述符	類型	指定磁盤名稱	文件大小	文件在磁盤上的標(biāo)識(shí)	打開文件確切名稱（誰(shuí)在訪問(wèn)）

[root@localhost ~]# lsof -i
COMMAND     PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
dhclient    707  root    6u  IPv4  12256      0t0  UDP *:bootpc 
dhclient    707  root   20u  IPv4  12211      0t0  UDP *:52171 
dhclient    707  root   21u  IPv6  12212      0t0  UDP *:cgms 
ntpd        799   ntp   16u  IPv4  13267      0t0  UDP *:ntp 
ntpd        799   ntp   17u  IPv6  13268      0t0  UDP *:ntp 
ntpd        799   ntp   18u  IPv4  13273      0t0  UDP localhost:ntp 
ntpd        799   ntp   19u  IPv4  13274      0t0  UDP localhost:ntp 
AliYunDun  1053  root   21u  IPv4 307323      0t0  TCP localhost:43876->100.100.30.25:http (ESTABLISHED)
sshd       1162  root    3u  IPv4  14660      0t0  TCP *:ssh (LISTEN)
java      19680 nexus   82u  IPv4 300159      0t0  TCP localhost:40129 (LISTEN)
java      19680 nexus  733u  IPv4 301293      0t0  TCP *:afs3-callback (LISTEN)
sshd      31905  root    3u  IPv4 508853      0t0  TCP localhost:ssh->172.10.116.232:15966 (ESTABLISHED)
sshd      32138  root    3u  IPv4 512855      0t0  TCP localhost:ssh->172.11.247.123:10033 (ESTABLISHED)
sshd      32159  root    3u  IPv4 513093      0t0  TCP localhost:ssh->172.11.247.123:10106 (ESTABLISHED)

1.2 按tcp查

查看所有tcp端口情況

[root@localhost ~]# lsof -i tcp
COMMAND     PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
AliYunDun  1053  root   21u  IPv4 307323      0t0  TCP localhost:43876->100.100.30.25:http (ESTABLISHED)
sshd       1162  root    3u  IPv4  14660      0t0  TCP *:ssh (LISTEN)
java      19680 nexus   82u  IPv4 300159      0t0  TCP localhost:40129 (LISTEN)
java      19680 nexus  733u  IPv4 301293      0t0  TCP *:afs3-callback (LISTEN)
sshd      31905  root    3u  IPv4 508853      0t0  TCP localhost:ssh->172.10.116.232:15966 (ESTABLISHED)
sshd      32138  root    3u  IPv4 512855      0t0  TCP localhost:ssh->172.11.247.123:10033 (ESTABLISHED)
sshd      32159  root    3u  IPv4 513093      0t0  TCP localhost:ssh->172.11.247.123:10106 (ESTABLISHED)
[root@localhost ~]# lsof -i tcp:7001
COMMAND   PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
java    19680 nexus  733u  IPv4 301293      0t0  TCP *:afs3-callback (LISTEN)

只查看7001端口情況

[root@localhost ~]# lsof -i tcp:7001
COMMAND   PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
java    19680 nexus  733u  IPv4 301293      0t0  TCP *:afs3-callback (LISTEN)

1.3 按udp查

與tcp一樣的用法

[root@localhost ~]# lsof -i udp
COMMAND  PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
dhclient 707 root    6u  IPv4  12256      0t0  UDP *:bootpc 
dhclient 707 root   20u  IPv4  12211      0t0  UDP *:52171 
dhclient 707 root   21u  IPv6  12212      0t0  UDP *:cgms 
ntpd     799  ntp   16u  IPv4  13267      0t0  UDP *:ntp 
ntpd     799  ntp   17u  IPv6  13268      0t0  UDP *:ntp 
ntpd     799  ntp   18u  IPv4  13273      0t0  UDP localhost:ntp 
ntpd     799  ntp   19u  IPv4  13274      0t0  UDP localhost:ntp 
[root@localhost ~]# lsof -i udp:123
COMMAND PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
ntpd    799  ntp   16u  IPv4  13267      0t0  UDP *:ntp 
ntpd    799  ntp   17u  IPv6  13268      0t0  UDP *:ntp 
ntpd    799  ntp   18u  IPv4  13273      0t0  UDP localhost:ntp 
ntpd    799  ntp   19u  IPv4  13274      0t0  UDP localhost:ntp

1.4 按協(xié)議類型查

ipv4或ipv6

[root@localhost ~]# lsof -i 4
COMMAND     PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
dhclient    707  root    6u  IPv4  12256      0t0  UDP *:bootpc 
dhclient    707  root   20u  IPv4  12211      0t0  UDP *:52171 
ntpd        799   ntp   16u  IPv4  13267      0t0  UDP *:ntp 
ntpd        799   ntp   18u  IPv4  13273      0t0  UDP localhost:ntp 
ntpd        799   ntp   19u  IPv4  13274      0t0  UDP localhost:ntp 
AliYunDun  1053  root   21u  IPv4 307323      0t0  TCP localhost:43876->100.100.30.25:http (ESTABLISHED)
sshd       1162  root    3u  IPv4  14660      0t0  TCP *:ssh (LISTEN)
java      19680 nexus   82u  IPv4 300159      0t0  TCP localhost:40129 (LISTEN)
java      19680 nexus  733u  IPv4 301293      0t0  TCP *:afs3-callback (LISTEN)
sshd      31905  root    3u  IPv4 508853      0t0  TCP localhost:ssh->172.10.116.232:15966 (ESTABLISHED)
sshd      32138  root    3u  IPv4 512855      0t0  TCP localhost:ssh->172.11.247.123:10033 (ESTABLISHED)
sshd      32159  root    3u  IPv4 513093      0t0  TCP localhost:ssh->172.11.247.123:10106 (ESTABLISHED)
[root@localhost ~]# lsof -i 6
COMMAND  PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
dhclient 707 root   21u  IPv6  12212      0t0  UDP *:cgms 
ntpd     799  ntp   17u  IPv6  13268      0t0  UDP *:ntp

1.5 按端口查

如22端口

[root@localhost ~]# lsof -i :22
COMMAND   PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
sshd     1162 root    3u  IPv4  14660      0t0  TCP *:ssh (LISTEN)
sshd    31905 root    3u  IPv4 508853      0t0  TCP localhost:ssh->172.10.116.232:15966 (ESTABLISHED)
sshd    32138 root    3u  IPv4 512855      0t0  TCP localhost:ssh->172.11.247.123:10033 (ESTABLISHED)
sshd    32159 root    3u  IPv4 513093      0t0  TCP localhost:ssh->172.11.247.123:10106 (ESTABLISHED)

沒(méi)使用的端口沒(méi)有查詢信息

[root@localhost ~]# lsof -i :8090
[root@localhost ~]#

1.6 按用戶查

如nexus用戶

[root@localhost ~]# lsof -a -u nexus -i
COMMAND   PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
java    19680 nexus   82u  IPv4 300159      0t0  TCP localhost:40129 (LISTEN)
java    19680 nexus  733u  IPv4 301293      0t0  TCP *:afs3-callback (LISTEN)

netstat

netstat 命令用于顯示網(wǎng)絡(luò)狀態(tài)，系統(tǒng)默認(rèn)都裝有該命令，下文主要介紹端口常用操作。

netstat -anp | grep ":22"

查看22端口

[root@localhost ~]# netstat -anp | grep ":22"
tcp        0      0 0.0.0.0:22              0.0.0.0:*                   LISTEN      1162/sshd           
tcp        0      0 172.9.204.26:22        172.10.116.232:15966     ESTABLISHED 31905/sshd: root@pt 
tcp        0      0 172.9.204.26:22        172.11.247.123:10106     ESTABLISHED 32159/sshd: root@pt 
tcp        0     52 172.9.204.26:22        172.11.247.123:10033   ESTABLISHED 32138/sshd: root@pt

netstat -tunplp

所有端口

[root@localhost ~]# netstat -tunplp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address             State       PID/Program name    
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1162/sshd           
tcp        0      0 0.0.0.0:7001            0.0.0.0:*               LISTEN      19680/java          
tcp        0      0 127.0.0.1:40129         0.0.0.0:*               LISTEN      19680/java          
udp        0      0 0.0.0.0:52171           0.0.0.0:*                           707/dhclient        
udp        0      0 0.0.0.0:68              0.0.0.0:*                           707/dhclient        
udp        0      0 172.9.204.26:123       0.0.0.0:*                           799/ntpd            
udp        0      0 127.0.0.1:123           0.0.0.0:*                           799/ntpd            
udp        0      0 0.0.0.0:123             0.0.0.0:*                           799/ntpd            
udp6       0      0 :::3003                 :::*                                707/dhclient        
udp6       0      0 :::123                  :::*                                799/ntpd

netstat -tunplp | grep ":22"

22端口

[root@localhost ~]# netstat -tunplp | grep ":22"
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1162/sshd

原創(chuàng)
Doflamingo
https://www.cnblogs.com/doflamingo

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