How to start nginx via different port(other than 80)

Question

Hi I am a newbie on nginx, I tried to set it up on my server(running Ubuntu 4), which already has apache running.

So after I apt-get install it, I tried to start nginx. Then I get the message like this:

Starting nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
configuration file /etc/nginx/nginx.conf test is successful
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)

That makes sense as Apache is using port 80.

Then I tried to modify nginx.conf, I reference some articles, so I changed it like so:

   server {

        listen       8080;

        location / {
         proxy_pass  http://xx.xx.xx.xx:9500;
         proxy_set_header   Host             $host:8080;
         proxy_set_header   X-Real-IP        $remote_addr;
         proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
         proxy_set_header Via    "nginx";
        }

After saving this and try to start nginx again, I still get the same error as previously. I cannot really find a related post about this, could any good people shred some light?

Thanks in advance :)

=========================================================================

I should post all the content in conf here:

user www-data;
worker_processes  1;

error_log  /var/log/nginx/error.log;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
    # multi_accept on;
}

http {
    include       /etc/nginx/mime.types;

    access_log  /var/log/nginx/access.log;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;
    tcp_nodelay        on;

    gzip  on;
    gzip_disable "MSIE [1-6]\.(?!.*SV1)";

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;

   server {

        listen       81;

        location / {
         proxy_pass  http://94.143.9.34:9500;
         proxy_set_header   Host             $host:81;
         proxy_set_header   X-Real-IP        $remote_addr;
         proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
         proxy_set_header Via    "nginx";
        }


    }
}

 mail {
      See sample authentication script at:
      http://wiki.nginx.org/NginxImapAuthenticateWithApachePhpScript

      auth_http localhost/auth.php;
      pop3_capabilities "TOP" "USER";
      imap_capabilities "IMAP4rev1" "UIDPLUS";

     server {
         listen     localhost:110;
         protocol   pop3;
         proxy      on;
     }

     server {
         listen     localhost:143;
         protocol   imap;
         proxy      on;
     }
 }

Basically, I changed nothing except adding the server part.

Answer 1

You have to go to the /etc/nginx/sites-enabled/ and if this is the default configuration, then there should be a file by name: default.

Edit that file by defining your desired port; in the snippet below, we are serving the Nginx instance on port 81.

server {
    listen 81;
}

To start the server, run the command line below;

sudo service nginx start

You may now access your application on port 81 (for localhost, http://localhost:81).