Linux

Automating Linux patching with Ansible – How to keep all your environments consistent ?

Your may want to patch your Linux servers on a regular basis (e.g using “yum/dnf update”). As always, it’s obviously recommended to : 1) Patch the TEST systems 2) Check if there is no side effects 3) Wait(…)

Switching from CentOS 8 to Red Hat 8

We have quite a few customers still running on CentOS 8 and you probably already are aware that CentOS 8 will be end of life by the end of this year. This forces a(…)

ODA and KVM: Debugging of DBsystem creation failure

Debugging errors when working with ODA is not always the easiest thing do... :-P It may become a bit tricky and not a straightforward process. In this blog I wanted to show you and example we faced with the debugging(…)

Recurring PostgreSQL Installations using RHEL 8 and Clones

This Blog is a follow up uf one of my older Blogs and my Article at heise.de: Blog at dbi-services.com Article at heise.de For RHEL 8 at its clones like AlmaLinux, CentOS, Oracle Linux and Rocky Linux(…)

De-Ubuntu Ubuntu

Canonical is consistently promoting Snap Integration in the Ubuntu world with all its market power. However, many do not like this development with Ubuntu. But what options do you still have as an Ubuntu user if you don’t necessarily want(…)

CentOS 8 binary compatible alternatives

There is a lot of roumors around since it was anounced to switch CentOS 8 from a Downstream Build from RHEL 8 to a Upstream Build for RHEL 8 on December 8th 2020. Many people asked why a second(…)

Automating Linux patching with Ansible

Since the beginning of the year, several vulnerabilities have been discovered in the Linux Kernel as well as in others important and widely-used packages. Among them, there was the famous CVE-2021-3156 affecting the sudo package and allowing(…)

Linux perf-top basics: understand the %

By Franck Pachot . Linux kernel has a powerful instrumentation that can be accessed easily. When you want to drill down into your program functions to understand their CPU usage, “perf” is the easiest. It can attach to the(…)

SUMA Server Part 2

In my previous Blog I wrote how to install and configure SUSE Manager. In this Blog I will go more in the deep like repository management and PXE boot configuration. Configuring repository To syncronize(…)

PostgreSQL on Linux: what is cached?

By Franck Pachot . In a recent tweet I wanted to highlight the importance of knowing what you measure with pgbench, because looking at “Transactions per second” without knowing if you are in shared buffer cache hits, or filesystem(…)