newer nginx (1.0.6) is not running on ubuntu server

Question

Installed nginx 0.8.54 with apt-get from ubuntu repo. Executing command "passenger-install-nginx-module" installed nginx 1.0.6 (I believe). After restart however, nginx -v still shows version 0.8.54. How to fire up the nginx 1.0.6?

Here is the error when starting nginx under /opt/nginx/sbin which is 1.0.6 (after stop the current nginx server):

    dtt@ubuntu:/etc$ sudo /opt/nginx/sbin/nginx 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 could not bind() 

Thanks.

Answer 1

Executing command passenger-install-nginx-module installed nginx 1.0.6 (I believe)

If you pay attention to the installation process, you will see that, by default it install Nginx with --prefix=/opt/nginx, so you must use the absolute path:

$ /opt/nginx/sbin/nginx -v
nginx: nginx version: nginx/1.0.6

---

$ /opt/nginx/sbin/nginx -V 
nginx: nginx version: nginx/1.0.6 
nginx: built by gcc 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4) 
nginx: TLS SNI support enabled 
nginx: configure arguments: --prefix=/opt/nginx --with-http_ssl_module --with-cc-opt=-Wno-error --add-module=/home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/ext/nginx

Why did you said it still shows 0.8.54?

How to start the nginx 1.0.6?

Stop the Nginx 0.8.54 first:

# /etc/init.d/nginx stop

or:

# /usr/sbin/nginx -s stop

and start Nginx 1.0.6 with:

# /opt/nginx/sbin/nginx

Don't forget to edit the init script to the new binary and configuration, something like this:

start() {
    configtest || return 1
    ebegin "Starting nginx"
    start-stop-daemon --start --pidfile /var/run/nginx.pid \
        --exec /opt/nginx/sbin/nginx -- -c /opt/nginx/conf/nginx.conf
    eend $? "Failed to start nginx"
}