linux某端口被占用如何释放啊？

Question

netstat -antp
lsof -i:5000

根本看不到进程id

Answer 1

Use the command to view

[root@web ~]# netstat -anp | grep 80
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      1652/nginx: master  
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      1377/httpd          
tcp        0      0 10.1.1.14:9300          10.1.1.18:59080         ESTABLISHED 1305/java           
tcp        0      0 127.0.0.1:49800         127.0.0.1:3306          ESTABLISHED 1715/zabbix_server: 
tcp        0      0 10.1.1.14:50480         10.1.1.17:10050         TIME_WAIT   -                   
tcp        0      0 127.0.0.1:3306          127.0.0.1:49806         ESTABLISHED 1410/mysqld         
tcp        0      0 127.0.0.1:50280         127.0.0.1:3306          ESTABLISHED 1699/zabbix_server: 
tcp        0      0 127.0.0.1:3306          127.0.0.1:49800         ESTABLISHED 1410/mysqld         
tcp        0      0 127.0.0.1:3306          127.0.0.1:49804         ESTABLISHED 1410/mysqld         
tcp        0      0 10.1.1.14:33880         10.1.2.16:10050         TIME_WAIT   -                   
tcp        0      0 127.0.0.1:49806         127.0.0.1:3306          ESTABLISHED 1711/zabbix_server: 
tcp        0      0 127.0.0.1:49808         127.0.0.1:3306          ESTABLISHED 1724/zabbix_server: 
tcp        0      0 10.1.1.14:36802         10.1.1.18:10050         TIME_WAIT   -                   
tcp        0      0 127.0.0.1:49804         127.0.0.1:3306          ESTABLISHED 1708/zabbix_server: 
tcp        0      0 127.0.0.1:49802         127.0.0.1:3306          ESTABLISHED 1706/zabbix_server: 
tcp        0      0 10.1.1.14:54880         10.1.1.16:10050         TIME_WAIT   -                   
tcp        0      0 10.1.1.14:54808         10.1.1.16:10050         TIME_WAIT   -                   
tcp        0      0 127.0.0.1:3306          127.0.0.1:49808         ESTABLISHED 1410/mysqld         
tcp        0      0 127.0.0.1:3306          127.0.0.1:49802         ESTABLISHED 1410/mysqld         
tcp        0      0 127.0.0.1:3306          127.0.0.1:50280         ESTABLISHED 1410/mysqld         
raw        0    768 0.0.0.0:1               0.0.0.0:*               7           23580/fping        

For example: 1652/nginx: master, where "1652" is the PID and "nginx: master" is the program name.

Use the following command to kill:

[root@web ~]# kill -9 1652

If you know what program this is, it is recommended to use the program's own command to stop the service instead of rudely ending it with kill.

Answer 2

The port is open because you have started the related service, you just need to turn off the service
Find the service and kill it or shut down

Answer 3

This is because the system needs a certain amount of time to release the port. For example, when writing the flask service, if it is not set to DEBUG mode, CTRL+C will often be required. This will cause the 5000 port to not be released immediately. When the service is started again, it will report that the port is occupied. . If you write the socket service yourself, you can add a line of code to enable the system to release the port immediately after the service stops.

socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

Answer 4

http://blog.csdn.net/cuiyong_... You can check this blog, it’s more detailed