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Introduction to Linux

What is Linux? Linux is an Open Source operating system(also known as an OS) that was created by Linus Torvalds in 1991. Linux is POSIX compliant which means that it is UNIX like, many of the commands that work on UNIX will also work on Linux. Do not be confused though, linux and UNIX are …

How To Install Windows 10 Technical Preview

Windows 10 Technical Preview has been released and you can now download and install it. I would recommend installing Windows 10 Technical Preview on a virtual machine or old PC not on your physical hardware that you use everyday, as this is a preview of Windows 10 not the final version it may have bugs …

How to install AsteriskNOW

Asterisk is a free and open source framework for building communications applications and is sponsored by Digium. Asterisk turns an ordinary computer into a communications server. Asterisk powers IP PBX systems, VoIP gateways, conference servers and is used by small businesses, large businesses, call centers, carriers and governments worldwide This video shows you the basic …

What is a PERT chart?

PERT stands for Program Evaluation Review Technique and is sometimes referred to a a Project Network Diagram The PERT chart is a project management tool that is used to schedule, organise and coordinate tasks for a project. The PERT chart is a graphical medium to demonstrate the project as a network diagram made up of …

Cannot connect to exchange server or OWA with Http Event 15021

Microsoft-Windows-HttpEvent – Event ID: 15021 An error occurred while using SSL configuration for endpoint 0.0.0.0:443. The error status code is contained within the returned data. This error is because the SSL certificate is not binded to the Exchange site properly. This will stop outlook being able to connect to exchange and also if you browse to …

How to fix WSUS error 800b0001

On Windows Server the error code 800B001 means that the client has the WUAgent V7.6.7600.256 and is missing a patch. To fix this is easy, you just need to install the patch KB2734608 which you can download from http://support.microsoft.com/kb/2734608. After installing the update you will need to re-index the WSUS database. To do this you …

SQL 2012 cannot connect ot wmi provider

The other day I went to open the SQL Configuration Manager on our SQL Server 2012 installation and I got the following error message: “Cannot connect to WMI provider. You do not have permission or the server is unreachable. Note that you can only manage SQL Server 2005 and later servers with the SQL Server …

USB Drive Letters Keep Changing – How To Fix

I had a problem with a USB drive that the default letter kept changing. Even when the USB drives letters were set using the disk management. Disk management usually works so you can try setting the USB drive’s letter using that. Follow these steps to allocate the drive letter: Open the device manager by pressing …