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 software contents are added to deploy and manage systems later.

If you already had a …

The last couple of years I spent a lot of time in managing Linux systems with Spacewalk and Red Hat Satellite 5. Because the application was superseded by the vendor, I investigated on migrations to the successor.

<img
  loading="lazy" …</picture></figure></p>

Recently, I had to remove a SAN LUN on a physical Enterprise Linux system. The first step was to alter the multipath service configuration file (/etc/multipath.conf) and make the daemon reload its configuration:

1# vi /etc/multipath.conf
2...
3ESC ZZ
4
5# service multipathd reload

Afterwards, the device was removed …

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 …

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 …

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 …