Category Archives: Technology

DMSB2013 presentation on Slideshare


I have added a presentation of the DMSB 2013 in Berlin, Germany to Slideshare.



Converting VMWare to VirtualBox

Post migrated from my old site:

Found most of this information on:…

When you have multiple files for your harddisk (like me), use (on Windows):

c:\Program Files\VMWare\VMWare Workstation\vmware-vdiskmanager -r old_hd.vmdk -t 0 new_hd.vmdk

Next, convert the vmdk file to a raw image by making use of qemu-img:

qemu-img convert new_hd.vmdk new_hd.bin

Next step is to convert the bin file to  a virtualbox .vdi file by making use of VBoxManage:

VBoxManage convertfromraw new_hd.bin new_hd.vdi

Next you can use your new image to set up a virtual machine in VirtualBox

Networking for VirtualBox: port forwarding

Post migrated from my old site:

If you would like to set up networking in VirtualBox so that the guest can still access the network and the host/other machines can access a port on the guest (for instance Apache), use NAT port forwarding for this:

Windows 7 – Getting the quick launch back

Post migrated from my old site:

If you are wondering how to get your quick launch back on Windows 7, here is a good explanation:…

Windows 7 – where to find the hosts file?

Post migrated from my old site:

Where to find the Windows 7 hosts file?

Answer: C:\windows\system32\drivers\etc\ or %systemroot%\system32\drivers\etc\

Thanks to

Minimizing Skype to the system tray on Windows 7

Post migrated from my old site:

Learned the trick here:

Nice Excel trick

Post migrated from my old site:

Thanks to
If you would like to show two Excel documents in separate windows (because you are using multiple monitors), open multiple copies of Excel by holding down the control key when clicking Excel. Drop the documents in the Windows and voila…
An even nicer trick of course is called

Mail merging e-mail in Outlook

Post migrated from my old site:

I always forget how to do mail merging in Office / Outlook. Here is the link which explains how it works:

Splitting and catting a tar file into 2 Gb chunks

Post migrated from my old site:

If you for some weird reason (which I have) would like to back large files up to a FAT32 volume and need maximum 2 Gb files, or for some other reason would like to chop up your backup file into chunks, use the following command:

tar -cvaf - *|split -b 2000m - volume.tar

To unpack use:

cat volume.tar* | tar xv

And wait a long time…

Shell scripting 101 for Linux

Post migrated from my old site:

Call me a stupid, but I always forget in what order to put the # and ! on the first line of a shell script.

So, to prevent this in the future, I will remember it here. The first line should be: