When the nginx service is started, the following message is displayed: Address already in use.

During LNMP, The nginx service was started and cannot be enabled. As a result, the web page cannot be opened. The following error message is displayed when starting the service:

Starting nginx: [emerg] bind () to 0.0.0.0: 80 failed (98: Address already in use)

Nginx: [emerg] bind () to 0.0.0.0: 80 failed (98: Address already in use)
Nginx: [emerg] bind () to 0.0.0.0: 80 failed (98: Address already in use)
Nginx: [emerg] bind () to 0.0.0.0: 80 failed (98: Address already in use)
Nginx: [emerg] bind () to 0.0.0.0: 80 failed (98: Address already in use)
Nginx: [emerg] still cocould not bind ()

Problem description: The address is already in use. The nginx service may be stuck, causing port occupation. This error occurs.

Solution: first, use lsof: 80 to check which program occupies port 80. Lsof returns the following results:

Command pid user fd type device size/OFF NODE NAME
Nginx 3274 root 6u IPv4 10664 0t0 TCP *: http (LISTEN)
Nginx 3547 nginx 6u IPv4 10664 0t0 TCP *: http (LISTEN)

It was found that it was an nginx program, so we dropped the nginx service k and restarted the service .. The command is as follows:

Kill-9 3274

Kill-9 3547

Service nginx start

Starting nginx: [OK]

OK. The service is started successfully !~~