I want to stop Nginx but it fails like this.

```
$ sudo service nginx stop
Stopping nginx:                                            [FAILED]

```

And `nginx.conf` that defines place of nginx.pid have a line.

```
# /etc/nginx/nginx.conf
pid        /var/run/nginx.pid;

```

But there is no `nginx.pid` in the directory `/var/run/`.

`locate nginx.pid` shows this output.

```
/var/run/nginx.pid 
/var/run/nginx.pid.oldbin

```

But after `updatedb` there is no match for the search.
I'm using nginx/1.4.4 in `CentOS release 6.5 (Final)`.

What should I do to stop the nginx daemon?

### Edit 2014/01/07

This is output of `ps -ef | grep nginx`, it seems nginx daemon is still running.

```
ironsand 17065 16933  0 15:55 pts/0    00:00:00 grep --color nginx
root     19506     1  0  2013 ?        00:00:00 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf
ironsand 19507 19506  0  2013 ?        00:00:25 nginx: worker process  

```

And `sudo service nginx restart` gives this error. I think `nginx` fails to start because old one still alive. And `/var/log/nginx/error.log-2014017` contains also this error.

```
Stopping nginx:                                            [FAILED]
Starting 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()
                                                           [FAILED]

```