Linux, windows command learning to view port occupancy and close the corresponding process

When troubleshooting problems on the linux server side, we sometimes encounter that a port is occupied by multiple applications, or when developing miscellaneous windows, we find that the port required by the system is occupied by other programs when starting the application. How to know who has it? The port we need is a headache for many people. Here is a very simple method, I hope it will be useful to everyone:

In Windows environment:

Start--run--cmd Enter the command prompt and enter netstat -ano to see the PID of all connections. After that, find the program corresponding to this PID in the task manager. If there is no PID in the task manager, you can find it in the task manager In the manager, select "View" - "Select Columns"

C:\Users\Administrator> netstat -ano
Active Connections
Protocol Local Address External Address Status PID
TCP 0.0.0.0:7 0.0.0.0:0 LISTENING 3012
TCP 0.0.0.0:9 0.0.0.0:0 LISTENING 3012
TCP 0.0.0.0: 13 0.0.0.0:0 LISTENING 3012
TCP 0.0.0.0:17 0.0.0.0:0 LISTENING 3012
TCP 0.0.0.0:19 0.0.0.0:0 LISTENING 3012
TCP 0.0.0.0:135 0.0.0.0:0 LISTENING 332
TCP 0.0. 0.0:443 0.0.0.0:0 LISTENING 3348
TCP 0.0.0.0:445 0.0.0.0:0 LISTENING 4
TCP 0.0.0.0:902 0.0.0.0:0 LISTENING 3112
TCP 0.0.0.0:912 0.0.0.0:0 LISTENING 3112
TCP 0.0.0.0:2869 0.0.0.0:0 LISTENING 4
TCP 0.0.0.0:3306 0.0.0.0:0 LISTENING 2964

If we need to determine who is occupying our port 2964, enter the following command at the command line:

C:\Users\Administrator> netstat -ano|findstr "2964"
TCP 0.0.0.0:3306 0.0.0.0:0 LISTENING 2964
It is found that the port is occupied by the application whose process PID is 2964

 What is the application whose process PID is 2964? Enter the following commands at the command line:

C:\Users\Administrator> tasklist|findstr 2964
mysqld.exe 2964 Services 0 10,828 K

 To end the application process, enter the following command:

C:\>taskkill /f /t /im mysqld.exe

 

Under linux environment:

1. Find the occupied port

 netstat -tln

 netstat -tln | grep 8080

 netstat -tln checks the port usage, while netstat -tln | grep 8080 only checks the usage of port 8080

 

 

 

2. Check which program the port belongs to? Which process is occupied by the port

 

lsof -i:8060

 

 COMMAND   PID   USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME

Java    20804   root   36u  IPv6 35452317      0t0  TCP *:pcsync-https (LISTEN)

 

 

3. Kill the process occupying the port and kill it according to the pid

 

kill -9 process id  

kill -9 20804