If you plan to restrict utilizing the root user under Linux, it is most likely that you will create sudo rules to allow certain users to execute administrative utilities. There are plenty of tools you really should not be able to run as privileged users - some examples:

screen, tmux

The famous terminal multiplexers GNU …

If you're testing the nightly builds of Katello, you might come into a situation where it is advisable to re-install the software completely.

As the particular installation steps are automated using Puppet, there is also a dedicated utility which automates uninstalling the software in a clean way: katello-remove.

This …

After upgrading Katello recently, I stumbled upon the following error when accessing the administration interface:

<img
  loading="lazy"
  decoding="async"
  alt="Katello error message"
  
    class="image_figure …</picture></figure></p>

Icinga2 is a very powerful monitoring system that can be used optionally with the new user interface Icinga Web 2. In comparison with Icinga 1.x, those tools have been developed completely from scratch - they have nothing in common with the legacy software stack.

This year, a configuration utility named Icinga Director …

Rcently I packaged the software scponly for Enterprise Linux using rpmbuild and stumbled upon an error message:

 1$ cd ~/rpmbuild/SPECS
 2$ rpmbuild -ba scponly.spec
 3checking for libgiertz...
 4...
 5/usr/bin/install -c -o 0 -g 0 scponly /home/cstan/rpmbuild/BUILDROOT/scponly-4.8-1.el7.centos.x86_64/usr/bin/scponly …

2016 seems to be the year of big hardware renewals for me - after completely overhauling my virtual infrastructure, I also needed new hard drives for my NAS after nearly 4 years.

NAS, DAS, what?

For many years, I have been using D.I.Y. NAS servers for collecting my data and media library on a single host. After I was …

If you want to combine multiple terminal sessions on one window, multiplexers such as tmux or GNU Screen are useful tools. I have been using screen for 10 years with the following configuration:

 1$ cat ~/.screenrc
 2# F7+F8 for tab switching
 3bindkey -k k7 prev
 4bindkey -k k8 next
 5
 6# disable welcome
 7 …

Using OMD it is possible to setup a working monitoring for checking infrastructure setups just within minutes.

But - what monitored OMD-relevant processes? Usually, a OMD site consists of multiple pre-configured services such as:

• Icinga or Nagios
• Apache web server
• Cron service
• rrdcached (for RRD graphs)
• npcd ( …