The Helpdesk For I.T. Administrators
This guide will step you through the process of creating a self signed SSL certificate using the OpenSSL application. Sometimes you just need to test something using SSL, without the need to pay for a certificate from a trusted certificate authority. This will allow you to set up a SSL site on Apache, Nginx, or …
By using a pre-compiled version of Nginx from your distributions repositories, you generally don’t know what modules are compiled into it. Common modules that you might need, but may not be compiled in by default, are IPv6, RealIP, SSL, and GZip compression support. To find out what configuration parameters were used to compile Nginx (and …
This howto guide will show you how to configure Varnish to allow you to purge specific items from the cache.
This howto guide will show you how to purge the varnish cache for a specific URL using the curl command line tool.
A default installation of PHP and Apache on a Ubuntu 12.04 will set a maximum upload limit of 2MB. Quite often you will want to increase this to a larger size. How high you set this limit will depend on your requirements. This howto guide will step you through the process to increase the PHP …
Varnish has the ability to reverse proxy to multiple backend servers if needed. This howto guide outlines the configuration settings needed to redirect requests to different backends. In our example, we have a web application backend (referenced to as “webapp”), and also a separate backend that just contains static content such as images, javascript, style …
This howto guide will go through the process of adding a new drive to a LVM array.
This howto guide will go through the process of moving data off a disk in a LVM array, so it can be physically removed from the system.
I recently came across a process on a Ubuntu installation by the name of “whoopsie”. I wasn’t sure what this was, or why it was running on the machine. Upon some investigation, I found that it’s the Ubuntu crash database submission daemon. I had no need to submit error reports back to Ubuntu, so I …
A default installation of MySQL server on a Linux machine will only listen for connections on the local interface (localhost or 127.0.0.1), so any remote connections can not be established. This how to article outlines the steps to change the configuration to listen on a specific, or all interfaces on the machine.