Nginx will not start (Address already in use)

Question

I have a problem with nginx. I tried different solutions, but for me nothing work. That is my error:

4 root@BANANAS ~ # sudo service nginx restart                                :( Restarting nginx: nginx: [emerg] bind() to [::]:443 failed (98: Address already in use) nginx: [emerg] bind() to [::]:443 failed (98: Address already in use) nginx: [emerg] bind() to [::]:443 failed (98: Address already in use) nginx: [emerg] bind() to [::]:443 failed (98: Address already in use) nginx: [emerg] bind() to [::]:443 failed (98: Address already in use) nginx: [emerg] still could not bind() nginx. 

Can you help me?

Answer 1

Probably other process is using specified port:

sudo netstat -tulpn 

Get the PID of the process that already using 443. And send signal with kill command.

sudo kill -2 <PID>  sudo service nginx restart 

Aternatively you can do:

sudo fuser -k 443/tcp 

Make sure you dont use old syntax:

server {     listen :80;     listen [::]:80; } 

The above syntax will cause

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

Correct syntax:

server {     listen 80;     listen [::]:80 ipv6only=on; } 

or

server {     listen [::]:80; } 

Both above syntax will achieve the same thing, listening on both ipv4 and ipv6.