Windows

Exchange server: Microsoft’s groupware at a glance

What is Exchange Server?

Microsoft Exchange Server is considered the standard solution for business e-mail traffic and computer-supported collaborative work. The software has many different usage models of available and these require purchasing special licenses. We’ll show you the licensing model here and give you an overview of the different functions of the collaborative software.

Setting up server backups with rsync

Server Backups with rsync

A server backup is the best method for securing the data of your online projects, thereby preventing any damaging losses. Server environments are especially in need of cleverly devised backup strategies that take every type of device into account. Here, backup programs become essential. Free applications, like rsync, offer reliable and compelling alternatives to their expensive conventional...

Hosts File

What is the hosts file and how do you edit it?

The hosts file used to resolve website names so that certain IP addresses could be accessed. The method was largely replaced by the DNS (domain name system). However, the hosts file is still indispensable for local networks. In addition, certain rules can be set for websites e.g. to block them. We show you where you can find and edit the hosts file in your operating system.

Module tests in software development

Software quality assurance: module tests

Module tests are one of the most effective methods of identifying as many errors in the source code as possible early on in the software development process. The special feature: the smallest isolatable components of a program are placed in a neutral test environment. If errors appear, it’s obvious they are occurring in the module being tested, which makes them easy to correct.

Windows won’t boot

Windows 7, 8, 10 will no longer start – causes and solutions

Every Windows user knows: No matter which version you use, the popular Microsoft operating system has its bad days. Sometimes these are so serious that the worst possible outcome happens: Windows won't boot anymore. You might think there’s nothing you can do, but don't panic: Boot problems and bluescreens can be solved quickly in most cases.

Introduction to netstat

What is netstat?

Various computer networks are connected with one another via the internet. In order to build up such connections, both the sending as well as the receiving systems have to provide transfer interfaces, or ports. Netstat allows you to find out which ports are opened by your own system and which active connections exist — all of this helps reduce the risk of undesired access attempts.

RabbitMQ

RabbitMQ: Quick message sending

There are many situations that require applications to communicate with each other in a quick and controlled way. RabbitMQ works as an intermediary between two services, and ensures a smooth distribution of messages. The two programs could even speak differing coding languages: this is not a problem for the message broker.

Windows blue screen

Windows blue screen (BSOD): How to cure the error

The infamous blue screen of death usually shows up without any warning. It’s an important indicator of internal problems with hardware, software, or drivers. If Windows can no longer be run as a result of such a problem, then the forced shutdown takes place in the form of a blue screen containing an error message. This may cause unsaved files and documents to be lost. The most important thing with...

Outlook won’t start

Outlook won’t start – what now?

You cannot start Microsoft Outlook, your calendar is no longer accessible, an important e-mail can no longer be retrieved – when Microsoft’s popular and useful e-mail program fails, you have to laboriously access your inbox via your e-mail provider’s website. Usually, a defective Navigation Pane, outdated add-ins, or a profile in need of repair are at fault. Even with issues lacking clearly...

Windows PowerShell

Introduction to PowerShell – Tools for system administrators

For a long time, Windows users were left behind when it came to command interpreters because the command prompt did not allow full access to operating system internal components, and scripting also offered only limited possibilities. This should finally change thanks to Microsoft’s PowerShell. The cross-platform program not only does much better than cmd.exe, it also provides remote computer...