It is a common procedure to use templates ("golden images") when deploying virtual machines. Recently I had an issue when deploying SLES machines - newly registered systems within SUSE Manager replaced older one. The management agent was installed within the template.

For classic systems (registered via RHNSD …

With FirewallD, some Linux distributions introduce a new default firewall differing heavily from previous interfaces. This post focusses the basic concept and some practical examples.

A major difference is that the firewall now supports changes in realtime without dropping active connections. FirewallD integrates …

Recently I had some issues with a Linux cluster running Corosync, Pacemaker and Apache. I was unable to run the redskin as ressource - starting always failed with "invalid parameter":

 1# crm resource start apache
 2# crm status
 3...
 42 nodes configured
 55 resources configured
 6
 7Online: [ deb9-node2 …

A fresh Spacewalk installation usually defines user accounts in a local manner - including permissions. Especially for bigger system landscapes with requirements such as Single Sign-on, this is not a practical solution.

Fortunately, Spacewalk and Red Hat Satellite 5 support authentication using FreeIPA and Red Hat …

After my last Spacewalk 2.7 installation I had the problem that synchronising repositories using the web interface failed with the following error:

<img
  loading="lazy"
  decoding="async"
  alt="Reposync error in Spacewalk 2.7 web …</picture></figure></p>

When installing Spacewalk 2.7 under CentOS 7.4 along with PostgreSQL 9.2.23, I recently stumbled upon the following error:

1# spacewalk-setup
2* Setting up SELinux..
3** Database: Setting up database connection for PostgreSQL backend.
4** Database: Installing the database:
5** Database: This is a long process that is …

Every Linux user knows the following scenario: a running process should be moved to another terminal. An example: an application update takes longer than expected and the status should be monitored on the go in GNU Screen. It's just nasty, if you forgot to prepare this prior to that.

Happily, there are plenty tools for …

When reinstalling one of my homelab vSphere cluster nodes I noticed again, that the Intel driver ixgbe is not part of the ESXi base image. This driver is needed for my Supermicro mainboard X10SDV-TP8F in order to enable 10G networking.

On the VMware download section there is an appropriate download for ESXi 6.0. …