Sergio Carracedo 
For a web developer, it is very important to have a fully optimized development and testing environment.
Regarding testing, it is recommended to test our web developments with as many browsers as possible.
If, as in our case, you use Linux as your development operating system, you can test most browsers without any problems: Firefox, Chrome, Opera, Konqueror, etc. (even Safari using wine), but there is one browser that will escape us and which, unfortunately for the web, is widely used: Internet Explorer.
A possible solution is to have a computer with Windows (XP, Vista, 7) with this browser and access it to perform the tests. This implies having a machine that will only run Windows, with the cost that entails.
The most economical solution is to install Windows in a virtual machine and perform the tests from there. In our case, we use VirtualBox.
The problem with starting the virtual machine on the same computer is the resource consumption, especially memory, which will reduce the computer’s performance and our productivity.
Therefore, taking advantage of the VRCP protocol implemented by VirtualBox, we can install the Windows virtual machine on another computer on the network and access said machine using a Terminal Server client. This way, we will shift the resource load (processor, memory, etc.) to another computer, also allowing multiple users to use the virtual machine from their workstations.
I am going to assume that we already have the virtual machine installed and configured on the remote computer (the installation documentation can be found here).
Now we access the computer where we have the virtual machine via SSH.
ssh equipo_vm
And we start the virtual machine but without a graphical interface:
VBoxHeadless -startvm "Windows 7"
Now we can connect to the machine via a terminal client and perform our tests.