Unable to start nginx: Not starting nginx as it is disabled in config

Symptoms

• Nginx is stopped:

  # service nginx status
  nginx is stopped

  OR

  # service nginx status
  nginx dead but pid file exists

• Cannot start Nginx:

  # /etc/init.d/nginx start
  Not starting nginx as it is disabled in config

• nginx service is disabled in:

  • CentOS/RHEL:

    # cat /etc/sysconfig/nginx
    NGINX_ENABLED=no

  • Debian/Ubuntu:

    # cat /etc/default/nginx
    NGINX_ENABLED=no

• Websites are down:

  CONFIG_TEXT: Problem loading page

  OR:

  CONFIG_TEXT: apache default page

• Webmail is not accessible on port 80 but works on port 7080:

  CONFIG_TEXT: connection refused

Cause

Nginx is disabled for starting in it's configuration

Resolution

1. Connect to the server via SSH;

2. Enable nginx in it's configuration file:

   • CentOS/RHEL:

     # vi /etc/sysconfig/nginx

   • Debian/Ubuntu:

     # vi /etc/default/nginx

3. Set this:

   CONFIG_TEXT: NGINX_ENABLED=yes

   in:

   • CentOS/RHEL:

     # cat /etc/sysconfig/nginx
     NGINX_ENABLED=yes

   • Debian/Ubuntu:

     # cat /etc/default/nginx
     NGINX_ENABLED=yes

4. Reconfigure nginx and apache to listen to correct ports:

   # plesk sbin nginxmng -d
   # plesk sbin nginxmng -e

5. Start nginx:

   # service nginx start