How to solve the problem that the port is occupied when opening Nginx

As shown in the figure:

Check the port occupancy:

sudo netstat -apn | grep 80

Check the process occupying the port:

ps -ef | grep 3345

It can be seen from the results that port 80 is occupied by nginx itself. You can kill the process and restart nginx

sudo kill -9 3345

##sudo netstat - apn | grep 80

After successfully killing the process, start nginx

Start nginx successfully. Enter the IP address of the system where nginx is located in the browser to verify whether nginx starts successfully

The following describes how to start, stop and restart nginx

Start

Startup code format: nginx installation directory address -c nginx configuration file address

For example:

[root@linuxserver sbin]# /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf

Stop

There are three ways to stop nginx:

Easy stop

　1. Check the process number

[root@linuxserver ~]# ps -ef|grep nginx

　2 , Kill the process

[root@linuxserver ~]# kill -quit 2072

##Quick stop

1. Check the process number

[root@linuxserver ~]# ps -ef|grep nginx

2. Kill the process

[root@linuxserver ~]# kill -term 2132
或 
[root@linuxserver ~]# kill -int 2132

Force stop

[root@linuxserver ~]# pkill -9 nginx

Restart

1. Verify whether the nginx configuration file is correct

Method 1: Enter the nginx installation directory sbin and enter the command ./nginx -t

See the following display nginx.conf syntax is ok

nginx. conf test is successful

means the configuration file is correct!

Method 2: Add -t before the start command -c

2. Restart the nginx service. Method 1: Enter the nginx executable directory sbin and enter the command ./nginx -s reload

Method 2: Find the current nginx process number, and then enter the command: kill -hup process No. to restart nginx service

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