sysctl tuning on Linux

While most Linux Kernels nowadays come with nice sysctl defaults, there’s always room for improvement. Some parameters can be used for performance tuning, others can be critical for security hardening. What is sysctl? sysctl is an interface to view and dynamically change parameters in Linux and other *NIX operating systems. In Linux, most of the dynamic Kernel settings can be […]

TCP connection states

TCP is the abbreviation for Transmission Control Protocol. It is one of the core protocols in the internet protocol suite and provides a reliable protocol to communicate in computer networks. Nearly every Internet-connected device “talks” TCP and the whole Internet relies on it.

Docker Pull Deprecation for v1.5 clients

A while ago, Docker announced that Docker pull requests from version 1.5 and earlier clients will no longer function as of December 15. While push requests have been disabled since Nov 19, pull requests were disabled for the Docker Hub today as well.

Django 1.9 released

Last week was the release of Django version 1.9. It’s a very popular and open source web framework that is written in Python. Django is widely spread in the internet and big platforms like Instagram, Reddit or Pinterest are using the framework. Ansible Tower is also based on the python web framework.

Ansible Modules – shell vs. command

In the Ansible Core are a lot of Ansible modules included for almost all use cases. On this page are all modules listed and described with the available options and some examples. Some Ansible modules are on the first view quite similar and can be used for the same purpose, but often are there some crucial […]

Hands-on with the new Apple TV 4

The Apple TV is a digital set-top box and entertainment device developed by Apple. After Apple released it’s first version of the Apple TV in January 2007, the latest and 4th generation version was released on 30 October 2015.

confirm at Web Summit in Dublin

The next few days confirm IT solutions is joining the Web Summit. It’s one of the biggest tech events in the world and takes place from 3th till 5th November in Dublin. To get more informations about the event check out the composition of links below.

Compare command outputs with process substitution

Every sysadmin knows the situation, if he has to compare the output of some commands. Most of us save the output of the commands in a temporary file, compares these files with the diff binary and afterwards delete the temporary files. In this blog post I’ll show you the usage of process substitution to get the differences of commands […]

Ansible Tower offline installation on a Red Hat system

A few days ago Ansible released a new version of their enterprise product Ansible Tower. It’s a web interface on top of the ansible core and offers a lot of useful features. In the release notes is a new topic listed that is an important requirement for some customers of us, bundled installation support. It’s now possible […]