How to successfully install VirtualBox guest additions on a ubuntu server 12.04 (x64). Tested with VirtualBox 4.26.x.

First install the required packages in the guest VM

sudo apt-get -y install build-essential
sudo apt-get install dkms
sudo apt-get install linux-headers-`uname -r`


Mount the guest additions CDROM

sudo mount -t iso9660 /dev/cdrom /media/cdrom

Run the installer

sudo ./media/cdrom/VBoxLinuxAdditions.run

Now to be able to access a shared folder, set the permissions for the user

sudo usermod -G vboxsf -a username

Reboot

sudo reboot now

You shared folder should be available in /media/

Voila!

For my new job we are moving a private Cloud setup to the next level using OpenStack and crowbar to rollout software on our machines. Today we spend some time setting up a crowbar admin server to perform the rollout of our OpenStack Ubuntu images.

I will try to blog regularly about my experiences setting up this awesome Cloud environment.

I will also add some links to site for my personal reference:

• http://robhirschfeld.com/crowbar/
• http://crowbar.zehicle.com/
• https://github.com/dellcloudedge/crowbar/wiki/Crowbar-2.0
• http://www.dell.com/openstack
• http://content.dell.com/us/en/enterprise/d/cloud-computing/crowbar-software-framework.aspx

Below a list of some excellent video resources that give you a glance at Crowbar and OpenStack in max 30 minutes:

• Introduction to Crowbar
• Installing Crowbar (on vmware)
• OpenStack in 10 minutes (with crowbar)

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When running JAX-WS applications on Apache Tomcat 7 you might encounter the following exception: To solve this add the webservices-api-x.y.jar to the CATALINA_HOME/endorsed directory. Do NOT add the webservice-rt-x.y.jar to the endorsed directory or you will encounter the following exception: Download article as PDF

DVCS Distributed version control systems gained a lot of attention over the last few years. There are many hosting providers that offer free DVCS space on the web. But there are situations that you want to run your own private DVCS server and do not want use a publicly and open DVCS like Gitorious, Github [...]