Rhel | cstan.io

Short tip: CentOS 7.4, PostgreSQL 9.2.23 and Spacewalk 2.7: Could not install database

Jan 18, 2018 · 2 min read · kurztipp spacewalk ·

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 …

System management with Foreman/Katello - Part 2: Products, Repositories and Content Views

Dec 19, 2017 · 10 min read · katello red-hat-satellite-6 ·

Share on:

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 …

System management with Foreman/Katello - Part 1: Introduction and installation

May 14, 2017 · 7 min read · katello red-hat-satellite-6 ·

Share on:

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 Because the application was superseded by the vendor, I investigated on migrations to the successor.

Report VMware vSphere RHEL guests to RHSM using Red Hat Satellite 6.2

May 11, 2017 · 3 min read · katello red-hat-satellite-6 ·

Share on:

If you're utilizing Red Hat Satellite 6 for managing virtual Red Hat Enterprise Linux instances, you will need to leverage Red Hat Subscription Management (RHSM) for maintaining licenses. In comparison with the former Red Hat Network Classic licensing, signed manifest certificates are used. For bigger system landscapes …
Read More

Short tip: Removing orphaned SAN multipath devices under Enterprise Linux

May 4, 2017 · 1 min read · kurztipp ·

Share on:

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 …

CentOS 7 and the incorrect dist RPM macro

Apr 18, 2017 · 2 min read · gitlab ·

Share on:

When creating RPM packages recently, I had the effect that package names on CentOS 7 were set incorrectly. For example, a package had the name pinkepank-0.6-1.el7.centos.x86_64.rpm but should have set pinkepank-0.6-1.el7.x86_64.rpm instead. As Enterprise Linux derivates (CentOS, Scientific Linux,...) offer binary …
Read More

Short tip: disable automatic NetworkManager connections after user logins

Nov 11, 2016 · 1 min read · kurztipp ·

Share on:

During a fresh CentOS installation recently I had the problem that a system's network connection was not working reliably. Sometimes pings were possible, sometimes not. After it was possible to elimiate the firewall as commonly root cause, it turned out that the network connectivity was only working if the console is …
Read More

Short tip: remove Katello completely

Aug 19, 2016 · 2 min read · katello red-hat-satellite-6 ·

Share on:

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 …

Integrate source code patches into RPM packages

Jun 30, 2016 · 3 min read ·

Share on:

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 …

Short tip: Enterprise Linux 7 and annoying prompts in GNU Screen titles

Jun 24, 2016 · 1 min read · kurztipp ·

Share on:

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 …