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 … Read more
Short tip: Apache and Pacemaker: invalid parameter
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“: # crm resource start apache … Read more
SUSE Linux Expert Days 2018 Frankfurt
Last Tuesday, one of the SUSE Linux Expert Days 2018 events was taking place in Frankfurt. Every year, SUSE arranges plenty of those events in order to update customers with talks and demonstrations about new … Read more
Authenticate Spacewalk users with FreeIPA
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 … Read more
CentOS 7.4, Spacewalk 2.7 and Reposync: Internal Server Error
After my last Spacewalk 2.7 installation I had the problem that synchronising repositories using the web interface failed with the following error:
Short tip: CentOS 7.4, PostgreSQL 9.2.23 and Spacewalk 2.7: Could not install database
When installing Spacewalk 2.7 under CentOS 7.4 along with PostgreSQL 9.2.23, I recently stumbled upon the following error:
Short tip: Move running processes into another terminal
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 … Read more
Short tip: ESXi 6.5, Supermicro X10SDV-TP8F and 10G NICs
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 … Read more
System management with Foreman/Katello – Part 2: Products, Repositories and Content Views
The last post of this series introduced the software projects Foreman and Katello. If you followed the instructions, you were able to login to a fresh Foreman installation. In this part, the new installation is filled with live: first … Read more
Migrate WordPress from qTranslate-X to WPML
I have been blogging in multiple languages for couple of years: in my mother tongue german and – because of international visitors – also in english. In the beginning I decided to go for the … Read more