Recently I was confused when I spotted several spam comments on my blog. After logging into the Wordpress administration page I saw the reason for this issue:

1Akismet has detected a problem. A server or network problem is preventing Akismet from working correctly.

Oops - where did that come from?

It seems like my …

While importing the recent EPEL7 YUM repositories I stumbled upon the following error:

1# /usr/bin/spacewalk-repo-sync --channel epel-el7-x86_64 
2> --url http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/ 
3> --type yum -c epel-el7-x86_64
4Repo URL: http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/
5ERROR: xz …

It is possible that RHEL7 channels aren't available to Red Hat Satellite even though you're having a valid Red Hat Enterprise Linux subscription.

The appropriate software channel (rhel-x86_64-server-7) is not part of the list of available channels - it also cannot be downloaded manually:

1# satellite-sync …

At about two years ago I replaced a lot of my hardware with more power-saving alternatives. My self-made NAS and hypervisor wer replaces by two HP ProLiant MicroServer G7 servers (N36L and N40L) - for a long time I was very happy with them.

In the last months the amount of VMs increased and now the CPU and memory …

Beside Linux systems also Oracle Solaris hosts can be managed using Spacewalk and Red Hat Satellite - a cool feature that is often forgotten. (Update: since Spacewalk 2.2 from 07/16/2014 this function is "deprecated" which means that it might be removed in one of the following releases)

Bigger companies which …

Using Raspbian it is possible to convert a Raspberry Pi into a full-featured Webserver with PHP support. Using SQLite the embedded web server is also capable of serving database-driven web applications.

First of all the official Monkey APT repository needs to be included - this can done very easily by addind a line …

It is possible that the following error message is displayed on client systems when software packages are distributed using Spacewalk, Red Hat Satellite or SUSE Manager:

1Error while executing packages action: empty transaction [[6]]

This issue rests on the database of the management suite. After a while (or after a …

If you're maintaining your system landscape with Spacewalk, Red Hat Satellite or SUSE Manager you might also see many old entries while having a look in the action list after a while:

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  decoding="async" …</picture></figure></p>

A couple of days ago I spent a lot of time with Kickstart under Spacewalk and Red Hat Satellite and was looking for a possibility for creating Kickstart Trees for CentOS comfortably.

Radomly I stumbled upon a blog article which served a useful script. That inspired me to create a more handy python script for that. …

Sometimes it is sufficient to know which RPM GPG-Keys have been imported. You can get this information with the following command:

1# rpm -qa --qf '%{VERSION}-%{RELEASE} %{SUMMARY}\n' gpg-pubkey*
2c105b9de-4e0fd3a3 gpg(CentOS-6 Key (CentOS 6 Official Signing Key) <centos-6-key@centos.org>)
3 …