Adrian Wyssmann

I am family father of five children and husband of the most beautiful and most amazing women in the world. I am also a technology enthusiast especially when it comes to computer and software and I am big fan of Linux. I am also really into the DevOps mindset and I advocate for it.

As I believe a good developer highly adaptable and should always look for ways to improve his/her technical skills, so this is what I do. Which is also what motivates me to do this blog. My primary goal is to write down new or cool stuff which I’ve learned. Writing it down helps to comprehend it. The advantage is I can always look it up again and perhaps - sharing it - helps other people as well.

Hosttech GmbH, a swiss-based datacenter and cloud provider

For some reason I got a free version of PCTipp, a Swiss PC magazine. Within the last issue, I found a promoted article about Hosttech GmbH, which now offers a virtual datacenter. Interesting enough for me to register and try it out.

Posted September 28, 2021 by Adrian Wyssmann ‐ 3 min read

Network simulation with GNS3 and CML

As I am currently working on refreshing my networking skills and as I want to get deeper into network security, I was looking for some courses. As part of this research, I stumbled over GNS3 and CLM, both tools to create virtual lab environments.

Posted September 26, 2021 by Adrian Wyssmann ‐ 6 min read

Use Archlinux as your pentest distribution

Often pen-tester/security expert/hacker use Kali Linux or Parrot as their distro of choice. While they are great, I use Archlinux as my daily driver. Thus I want to have the same toolset as these distros installed and configured on my Archlinux

Posted September 19, 2021 by Adrian Wyssmann ‐ 2 min read

How to add encoded key- and truststore to K8s secret

Working with java applications in kubernetes, you might come use

Posted September 9, 2021 by Adrian Wyssmann ‐ 2 min read

Keystore and Truststore in Java

Working with java applications in you might know what is a keystore and what is a truststore. For the ones not aware, here a quick intro.

Posted September 9, 2021 by Adrian Wyssmann ‐ 3 min read

Rancher 2.5.x v2 logging using splunk

Installing and configuring logging with Rancher is quite easy, but in combination with Splunk some guidance might be helpful. I guide you trough the process of the complete installation and configuration

Posted September 9, 2021 by Adrian Wyssmann ‐ 5 min read

Rancher 2.5.x monitoring and alerting with MS Teams

Installing monitoring and configuration with Rancher is quite easy, but in combination wit alerting for MS Teams some guidance might be helpful. I guide you trough the process of the complete installation and configuration

Posted September 9, 2021 by Adrian Wyssmann ‐ 5 min read

Collecting logs from salt-managed nodes without ssh access

We manage our baremetal kubernetes nodes with salt and for security purposes, there is no direct ssh access. The only way to access them is using salt-master. This can be challenging if you want to get some files from the nodes, but it's possible.

Posted September 8, 2021 by Adrian Wyssmann ‐ 3 min read

Your first Kubernetes deployment

Kubernetes is complex and at first overwhelming if you never did something with it. In this post I want to focus on a simple deployment and putting some pieces (Pod, Deployment, ConfigMap, Ingress) together to get a better understanding for newbies.

Posted August 17, 2021 by Adrian Wyssmann ‐ 4 min read

Manually create certificates and certificate signing request

As we don't have an automated certificate management 😭 we have to create certificates and Certificate signing request manually. If you are in the same boat, this information might help you.

Posted August 15, 2021 by Adrian Wyssmann ‐ 2 min read

Upgrade istio, monitoring and logging from Rancher 2.4.x. to 2.5.x

While we are using Rancher 2.5.x our current cluster management solution, we actually still are using the old istio- and monitoring-stack v1 rather than v2. We want to change that but it is not as easy as we thought.

Posted August 5, 2021 by Adrian Wyssmann ‐ 4 min read

New ansible role papanito.systemd_notifiers

Based on my last blog post, I've created a new ansible role to setup a systemd notification service for failing systemd services

Posted July 18, 2021 by Adrian Wyssmann ‐ 1 min read

Notifications for failing Systemd services

When systemd services fail you usually don't really notice it unless it's a critical service. However there may be situations where it would be nice that you are mare aware of failing services.

Posted July 16, 2021 by Adrian Wyssmann ‐ 3 min read

How I manage my dotfiles

It is common practice to track dotfiles with a version control system like Git and to synchronize them across various hosts. There are various approaches, so I would like to tell you how I do it

Posted July 15, 2021 by Adrian Wyssmann ‐ 4 min read

Link Collection Update

Github has a lot of interesting projects and resources and you can easily star them. However, it's hard to remember what you starred so I've updated my collection of links in order to better highlight and find tools

Posted July 13, 2021 by Adrian Wyssmann ‐ 1 min read

Packet filtering in Linux - iptables, nftables and firewalld

Packet filtering is essential for network security and Linux offers this out of the box. There are different possibilities like iptables, nftables or firewalld, and a basic understanding of these is very useful.

Posted July 9, 2021 by Adrian Wyssmann ‐ 8 min read

Connect an on-premises network to Azure

While modern companies may use a pure cloud approach, there are still companies which still have their own datacenter. Thus connecting your on-premiss network to the cloud is essential. In this post, I will have a look on how this works and what is required, focusing on Azure, as this is what we currently use at my employer.

Posted July 7, 2021 by Adrian Wyssmann ‐ 1 min read

Microsoft Azure: Connect an on-premises network to Azure

Outline the ideas and possibilities of connecting an on-premises network to Azure

Linux on Microsoft Azure

While starting to look at Azure, I am positively surprised on how Linux and open source (databases) are supported. Thus I want to mention a few words about it.

Posted July 5, 2021 by Adrian Wyssmann ‐ 2 min read

Cheatsheets and KB

Until know I have my own cheatsheet section in may website. Even so writing them helped me to memorize some stuff, they are far from complete. Thus I decided to drop them in favor of community driven solutions.

Posted July 1, 2021 by Adrian Wyssmann ‐ 4 min read

Authentication and Authorization in Kubernetes

Authentication (who am I) and authorization (what I am allowed to do) are essential and thus having a basic understanding on how Kubernetes handles this, is very useful.

Posted June 23, 2021 by Adrian Wyssmann ‐ 11 min read

What is the Kubernetes API and CRD

When working with Kubernetes CRDs is something that you will stumble upon, so you should know what it is. But this does not go without understanding the main principles of the Kubernetes API

Posted June 21, 2021 by Adrian Wyssmann ‐ 6 min read

Microsoft Azure Fundamentals

As we start looking into Azure, my employer established a Microsoft Enterprise Skills Initiative. This is my first course and I will summarize for you what I've learned

Posted June 10, 2021 by Adrian Wyssmann ‐ 1 min read

Microsoft Azure: Access and Resources

Summary of what I learned in the complete course for my Azure certifications

Microsoft Azure: AI service

Summary of what I learned in studying for my Azure certificates

Microsoft Azure: Compute

Summary of what I learned in studying for my Azure certificates

Microsoft Azure: Container Services

Summary of what I learned in studying for my Azure certificates

Microsoft Azure: Database and Analytics Services

Summary of what I learned in studying for my Azure certificates

Microsoft Azure: Migration

Summary of what I learned in the course Microsoft Azure Fundamentals AZ-900 about migrating to azure

Microsoft Azure: Networking Services

Summary of what I learned in studying for my Azure certificates

Microsoft Azure: Observability

Summary of what I learned in studying for my Azure certificates

Microsoft Azure: Security and Network Security

Summary of what I learned in studying for my Azure certificates

Microsoft Azure: Storage Services

Summary of what I learned in studying for my Azure certificates

What is cloud computing?

As I start looking into Azure, I thought it may be a good starting point to look into understanding what cloud computing is

Posted June 7, 2021 by Adrian Wyssmann ‐ 8 min read

Self-Paced Studying of Programming and SW Engineering

Not everybody can afford a study at an university, either cause you cannot afford it or you have other obstacles e.g a mother or father taking care of children. However, this should not stop you to study what you like. There are some nice collections of resources that allow you to study informatics, programming and sw engineering for free.

Posted June 5, 2021 by Adrian Wyssmann ‐ 2 min read

What is istio?

I introduced the basics of a service-mesh in my last post. Here I will go into more details of isito, one of the most known service mesh in the kubernetes world.

Posted May 31, 2021 by Adrian Wyssmann ‐ 6 min read

What is as a service mesh?

You may have heard the term service mesh but what is it exactly? With this post I try to get an understanding of what a service mesh is and when it is used.

Posted May 28, 2021 by Adrian Wyssmann ‐ 5 min read

Crowdsec, a collaborative behavior detection engine

Last Wednesday I was attending the DevOps Connect: DevSecOps at RSAC 2021, whereas a cool project was presented: Crowdsec, a collaborative behavior detection engine, coupled with a global IP reputation network

Posted May 22, 2021 by Adrian Wyssmann ‐ 11 min read

What is Stackrox (Red Hat Advanced Cluster Security for Kubernetes)?

At my current employer we use a container security platform called Stackrox, which recently was acquired by RedHat. But that is it exactly and for what is it good?

Posted May 17, 2021 by Adrian Wyssmann ‐ 6 min read

Update of packer-vagrant project using HCL

Since I last used packer it's been a while and when I recently wanted to create a new Windows vm, I used my project. This is where I realized certain things have changed with packer since I started the project.

Posted May 13, 2021 by Adrian Wyssmann ‐ 2 min read

List of Free Developer Resources (XaaS)

During the years, I tried different services. Some of them offer offered free tiers/plans for developers or small teams. So I thought it would make sense to create a list, which can be easily shared with others.

Posted May 12, 2021 by Adrian Wyssmann ‐ 1 min read

Convert Manjaro Linux back to Arch Linux

Manjaro is e very popular distribution based on Arch. I tried it for several months ultimately decided to switch back to pure Arch. But how to do so, without a complete new installation?

Posted May 7, 2021 by Adrian Wyssmann ‐ 6 min read

Flameshot: A cool tool to make screenshots under Linux

Writing technical blogs often requires to do screenshot, where you may also want to highlight stuff of even obsfucate sensitive data.

Posted May 5, 2021 by Adrian Wyssmann ‐ 2 min read

Create an encrypted container in Linux

In case you have sensitive files which you want to additionally protect, you could add the to a zip file and encrypt the zip file. Or you might as well use an encrypted container

Posted May 5, 2021 by Adrian Wyssmann ‐ 2 min read

Introduction to Grafana Cloud

If you have servers you definitively want to collect logs in a central place and store them for some time, so you can investigate what happens in case of issues. I personally rely on logz.io, but Grafana Cloud looks like a promising alternative

Posted May 3, 2021 by Adrian Wyssmann ‐ 5 min read

Introduction to Logz.io

If you have servers you definitively want to collect logs in a central place and store them for some time, so you can investigate what happens in case of issues. I personally rely on logz.io

Posted May 1, 2021 by Adrian Wyssmann ‐ 3 min read

Continuous integration (CI), continuous deployment (CD) and continuous delivery (CD)

As a developer you are familiar with the terms continuous integration (CI) and continuous deployment (CD), which is often referred as CI/CD. However it's important to understand that these are different processes with different purposes.

Posted April 30, 2021 by Adrian Wyssmann ‐ 5 min read

New major release 3.0.0 of ansible role papanito.cloudflared

I finally found some tome to improve my cloudflared ansible role, to be abel to use named tunnels

Posted April 25, 2021 by Adrian Wyssmann ‐ 1 min read

Microsoft Enterprise Skills Initiative

As we start looking into Azure, my employer established a Microsoft Enterprise Skills Initiative.

Posted April 23, 2021 by Adrian Wyssmann ‐ 1 min read

Automated OS update with kured for servers running k8s

If you are running a bare-metal cluster you probably run kubernetes on top of some linux os, these systems have to be regularly updated. But an update means sometimes that you have to reboot your servers. This also means during a reboot that particular node is node available to schedule workload.

Posted April 20, 2021 by Adrian Wyssmann ‐ 6 min read

How to know when your Linux system requires a reboot

When you manage Linux systems it's usually pretty clear how to reboot a system. But do you know how to check whether a system requires a reboot? Cause you don't want to reboot a system if it is not necessary

Posted April 20, 2021 by Adrian Wyssmann ‐ 2 min read

What is Cloudflare and why I love it

Ever since I discovered Cloudflare I am a big fan of it. They offer a lot of great products, especially also for me as an individual with a very tiny - or non-existent - IT budget.

Posted April 19, 2021 by Adrian Wyssmann ‐ 5 min read

Linux Presentation Day (LPD)

Did you ever heard of Linux Presentation Day (LDP). If not, I will tell you about.

Posted April 16, 2021 by Adrian Wyssmann ‐ 2 min read

How to work with multiple projects in Hetzner Cloud

In Hetzner Cloud you can have multiple projects. As you can have different members per group, it really makes sense to have different projects for different purposes. I will explain in this article on how I work with multiple projects in Ansible, as well when using the cli

Posted April 16, 2021 by Adrian Wyssmann ‐ 3 min read

How to pass lists and dicts as extra vars when running an ansible playbook

Passing simple strings to an ansible playbook as extra-vars is easy, but what if you want to pass lists or dictionary? Let's see...

Posted April 16, 2021 by Adrian Wyssmann ‐ 4 min read

Re-use artifacts (playbooks, tasks, ...) in Ansible

I recently struggled into an issue where I have certain tasks which I want to run for the bootstrapping, as well when applying the desired state. I don't want to have to repeat the same task in different playbooks, so I had a look into reusable of ansible elements

Posted April 15, 2021 by Adrian Wyssmann ‐ 4 min read

What are tags in Ansible and how to use them

Sometimes you have playbooks or roles which you only want to execute parts of it and not all. This is where you can use ansible tags.

Posted April 14, 2021 by Adrian Wyssmann ‐ 8 min read

How to push docker images to another registry

Sometimes it may be necessary to 'copy' docker images from one registry to another one - which is a very easy thing to do

Posted April 12, 2021 by Adrian Wyssmann ‐ 2 min read

Create Firewalls for Hetzner Cloud using Ansible

Firewall for Hetzner Cloud is relatively new, but since I use ansible I really would like to create my firewalls the same way I to all my other stuff

Posted April 8, 2021 by Adrian Wyssmann ‐ 1 min read

Dynamic inventory with Ansible and Hetzner Robot and Hetzner Cloud

I use Hetzner Servers and Hetzner Cloud for my own infrastructure which I setup with Ansible since the beginning. It's usually not much servers so overseeable. However, maintaining static inventory for my ansible project is a bit cumbersome when you already have all information available in the management interface. So let's see what we can do about and how I can reduce manual overhead.

Posted April 8, 2021 by Adrian Wyssmann ‐ 6 min read

Story Points - Equating Points to Time

There is often a huge misunderstanding what story points are, so let's have quick look at what they are

Posted April 7, 2021 by Adrian Wyssmann ‐ 2 min read

Diagrams as Code: Plantuml or Mermaid

Drawing diagrams is a common task as sw developer and one is often used to draw them actually in something like Visio or draw.io.

Posted March 25, 2021 by Adrian Wyssmann ‐ 3 min read

How to get a time difference of two log entries

I recently was tasked with a small problem on how to get a time difference of two log entries

Posted March 23, 2021 by Adrian Wyssmann ‐ 5 min read

Implementing a vulnerability Waiver Process for infected 3rd party libraries

Here I want to explain why and how I engineered a vulnerability Waiver Process for infected 3rd party libraries.

Posted March 18, 2021 by Adrian Wyssmann ‐ 9 min read

Sign your commits with a gpg key

Often open source projects require you to sign your git commits in order to verify they are coming from you. I made a quick tutorial on what is needed.

Posted March 15, 2021 by Adrian Wyssmann ‐ 4 min read

How to rescue data from windows

My son has a Surface Go Tablet which suddenly stopped booting. Even after trying to uninstall patches etc. I could not bring it back, so I decided to help him to get the data from the tablet, so he can use it.

Posted March 13, 2021 by Adrian Wyssmann ‐ 3 min read

How to increment versions in maven builds - alternative to maven release plugin

Maven release plugin does a great job incrasing the version in maven builds. Still sometimes you may need an alternative.

Posted March 3, 2021 by Adrian Wyssmann ‐ 3 min read

Update Your Rss Reader

The link to the rss feed has changed

Posted February 22, 2021 by Adrian Wyssmann ‐ 1 min read

Switching Static Website Generator

Switching my website from Jekyll to Hugo and the reasons why

Posted February 21, 2021 by Adrian Wyssmann ‐ 8 min read

Microsoft Azure

My learning notes about Azure

papanito.systemd_notifiers

Ansible role to setup a systemd notification service for failing systemd services

Development Resources

Collection of Development Resources and Frameworks

E-learning

A collection of resources that help you to study programming and sw engineering by yourself and for free

Infrastructure (cloud, k8s)

Tools for your Infrastructure incl. Cloud and Kubernetes

Security and Pen-Testing

Resources related to IT security and pen-testing

Tools for Linux and Windows

Useful tools for Linux and Windows

Declarative pipelines with Jenkins

I guess working in sw development we all know Jenkins and the ones how have to maintain it, knows the pain it can cause. Still, even if there are (better) alternatives, Jenkins may still be the first choice for a lot of companies. I would like to share here some things, which helps to reduce duplication of code and sharing pipelines among teams.

Posted June 14, 2021 by Adrian Wyssmann ‐ 11 min read

Regular Expression - ignore or exclude a specific word, find everything else

I want to use a regular expression to exclude a complete word. I need this for a particular situation which I explain further

Posted March 24, 2021 by Adrian Wyssmann ‐ 2 min read

gpg

Cheatsheet for gpg

Links

My links collections

Online tools and services

Useful online tools and services

papanito.git

This role is used for simplified git checkouts using a list of git repos.

papanito.ttrss

ansible role to install ttrss with all it's dependecies (php, postgres, lighttpd)

papanito.borg

Ansible role do install and setup regular backups with borg-backup

papanito.rsyslog

Ansible role to forward syslog to a log service like Loggly.com or Logz.io

Privacy Policy

Our Privacy Policy

papanito.cloudflared

This ansible role does download and install cloudflared on the host and optionally installs the argo-tunnel as a service.

Projects

My personal projects

Cheatsheets

Collection of cheatsheets

Code of Conduct

Contributor Covenant Code of Conduct

Docs

Technical documentation, educational docs and tutorials

Our Thesis

Task and objectives of the diploma thesis

Installation of dependencies of an ansible role

Some observations regarding using dependencies in ansible roles

Posted February 4, 2021 by Adrian Wyssmann ‐ 3 min read

Hetzner Cloud referral

Posted February 1, 2021 by Adrian Wyssmann ‐ 1 min read

Successful jenkins build remains "In Progress" in Bitbucket - and how to workaround

It may happen that even so successful jenkins build remains "In Progress" in Bitbucket.

Posted January 13, 2021 by Adrian Wyssmann ‐ 3 min read

git hooks

Did you ever pushed stuff to a git repo and then breaking your branch, just cause you did not checked beforehand, if all is fine. I'm sure you did. Wouldn't it be just cool if some checks ran automatically before committing or pushing?

Posted December 31, 2020 by Adrian Wyssmann ‐ 2 min read

git

Podman - a daemon-less docker alternative

Podman is a daemonless container engine for developing, managing, and running OCI Containers on your Linux System. Containers can either be run as root or in rootless mode.

Posted November 13, 2020 by Adrian Wyssmann ‐ 6 min read

Github actions release workflow

Even so I mostly use Gitlab, I am also active in Github, especially also for the ansible roles which I host in GIthub - just cause everything related to ansible can also be found there.

Posted August 3, 2020 by Adrian Wyssmann ‐ 5 min read

My ansible roles

In meanwhile I got some experiences in writing roles and yesterday I finally finished my 3rd role - for me this is much considering my spare time left after work and family.

Posted July 23, 2020 by Adrian Wyssmann ‐ 2 min read

Nextcloud

Cheatsheet for Nextcloud

My Cheatsheets - Update

I've update the collection of my personal cheatsheets - you can find them also on the top-left menu

Posted April 13, 2020 by Adrian Wyssmann ‐ 1 min read

Linux

Cheatsheete for linux commands

MS Teams

Cheatsheet on how to use MS Teams

MS Teams Tips and Tricks

Posted March 27, 2020 by Adrian Wyssmann ‐ 1 min read

Remote Work Tips and Tricks

Posted March 18, 2020 by Adrian Wyssmann ‐ 5 min read

Extended Backus Naur Form (EBNF)

A quick introduction to Extended Backus Naur Form (EBNF)

Posted November 15, 2019 by Adrian Wyssmann ‐ 7 min read

Powershell

Cheatsheet powershell

vi

Cheatsheet for vi

Create jenkins JLNP slave programmatically

Adding a slave to a Jenkins master always required to add the slave via the GUI and then gather the secret in order to be able to connect the slave. So I was wondering whether a slave could be created programmatically.

Posted March 15, 2019 by Adrian Wyssmann ‐ 2 min read

Cheatsheet vi

Posted March 8, 2019 by Adrian Wyssmann ‐ 1 min read

How to work with git - a newbie guide

I got in touch with git when I was starting using Github. However as these projects were merely single contributor projects, some basic commands did it for my work there. There was no branching, no rebasing or whatsoever. Now after working on a daily basis with git and using it in big(ish) teams, I thought to write down a little guide for newbies on how to work with git.

Posted March 4, 2019 by Adrian Wyssmann ‐ 12 min read

git

Back again, everything new

Wow it has been already one year since I published my last blog entry. How time passes... Not that I have nothing to write, in contrary there are a lot of new exciting things I have done and learned in the past 1 and a half year since I've started my new job. Hopefully I find time again to write more again cause I really want to share whatever I can.

Posted March 1, 2019 by Adrian Wyssmann ‐ 2 min read

Saltstack

Cheatsheet for Saltstack

Sync git repos between different Git git hosters

Posted March 22, 2018 by Adrian Wyssmann ‐ 2 min read

Access Github from behind a proxy

Posted March 20, 2018 by Adrian Wyssmann ‐ 1 min read

git

Cheatsheet for git

Configuration Management and Testing

Configuration management has always been a challenging topic. But what is it? Why is it so challenging?

Posted December 21, 2017 by Adrian Wyssmann ‐ 2 min read

Cleanup of Windows

I recently run into the problem that my Harddisk (250GB) run full. Especially when installing Visual Studio, different SDKs (.Net, Android, ...), Microsoft Office, etc. your disk space may become rare. The problem is not only because of the size of these software but also cause Windows is keeping a lot of (unnecessary) files in various locations.

Posted October 19, 2017 by Adrian Wyssmann ‐ 5 min read

Introduction to Maven

Maven is a tool to automate the building, distribution and dependency management of software artifacts in a project. It is one of many build systems but currently heavily used in the Java world.

Posted October 2, 2017 by Adrian Wyssmann ‐ 5 min read

Build and Test .NetCore2.0 app with Jenkins

Recently, for a job interview I had to solve a development task: Create a .NET C## application which converts digital numbers into roman numbers

Posted September 20, 2017 by Adrian Wyssmann ‐ 7 min read

Docker basics hands-on

I wrote quick "Hands-on" for beginners to cover docker basics with simple containers so I won't go into details of complex application, service definitions or swarms. What I want to do is run a webserver inside a container with persistent data

Posted April 27, 2017 by Adrian Wyssmann ‐ 3 min read

Vagrant vs. Packer

When I started to investigate into tools which help to automate provision of virtual machines, I found packer and vagrant, both tools provided by Hashicorp.

Posted April 13, 2017 by Adrian Wyssmann ‐ 8 min read

Unattended Installation of Linux and Windows

Unattended installation is the possibility to install an operating system without human interaction. Principally it is the same for Windows and Linux: An "answer file" which describes the configuration is provided as an input for the installer. These "answer files" provide any kind of setup options including how to partition disks and what packages/features to install.

Posted April 12, 2017 by Adrian Wyssmann ‐ 4 min read

Powershell Remoting

Powershell remoting enables to work on a remote computer as you may be used on Linux using ssh. In difference to Linux, where this is usually straight-forward, I find it a bit more complicated on Windows - however achievable. There are two was a remote PS connection can be established - via HTTP or HTTPS.

Posted March 11, 2017 by Adrian Wyssmann ‐ 6 min read

First Docker image for Windows

Posted March 10, 2017 by Adrian Wyssmann ‐ 5 min read

Docker on Windows

Everyone loves docker even Microsoft embraces docker.

Posted January 11, 2017 by Adrian Wyssmann ‐ 8 min read

Docker and Data Storage

Not everything can live without persistent storage, so let's see how docker offers and handles it.

Posted December 23, 2016 by Adrian Wyssmann ‐ 12 min read

Snapshots with Virt-Manager

My work computer runs on Windows, so whenever I quickly need a VM, I use Virtualbox or VMWare Workstation. But my home computer runs on Linux and there I use KVM/Qemu instead - yes I also could use Virtualbox but I don't.

Posted December 23, 2016 by Adrian Wyssmann ‐ 1 min read

Arch Linux Security Tracker Announced

Yesterday the Arch Linux Security Team the new security tracker for Arch Linux

Posted December 22, 2016 by Adrian Wyssmann ‐ 2 min read

False negative / false positive tests

Software testing is not only running test cases but more of using a testers mindset and skills to find bugs and verify that the software is working correctly. However, usage of test cases (manual or automated) is essential to speed-up your testing and having reproducible tests for your regression testing. Obviously you want to be able to trust the tests - especially the outcome of these tests. However, regardless whether it is manual or automated testing, there are two terms you should understand and bear in mind. So what is it?

Posted December 19, 2016 by Adrian Wyssmann ‐ 8 min read

Open data platform of the swiss public transport

The public transport organization SBB recently opened platform for customer information data on public transport in Switzerland. Anyone can obtain obtain data on public transport free of charge and get access to specific public transport services for all licensed transport companies in Switzerland. The platform provides timetable, real-time and actual data.

Posted December 13, 2016 by Adrian Wyssmann ‐ 6 min read

Windows Subsystem for Linux (WSL)

Posted December 7, 2016 by Adrian Wyssmann ‐ 9 min read

Docker - what is it?

Posted December 5, 2016 by Adrian Wyssmann ‐ 13 min read

Do you spot it ...

Recently found on the entrance of a parking in the city of Lucerne. One of the signs does not seem right...

Posted December 3, 2016 by Adrian Wyssmann ‐ 1 min read

Setup Arch Linux on my new Acer Aspire V7 Nitro

Posted November 25, 2016 by Adrian Wyssmann ‐ 9 min read

Regular Screenshot of a website

Posted November 2, 2016 by Adrian Wyssmann ‐ 2 min read

Test Data Management

Test data management is crucial on the test engineering process and therefore shall be considered carefully. But what is 'Test Data Management' and why is it important?

Posted October 21, 2016 by Adrian Wyssmann ‐ 14 min read

How to report bugs?

When I used to work as test manager I encouraged my people to write issues/bugs that have certain quality. But actually this is not only true for testers but generally for everyone who reports bugs - especially if you are not in direct contact with the developers.

Posted October 17, 2016 by Adrian Wyssmann ‐ 7 min read

Microsoft Azure - First steps

Working for my current employer, I have an MSDN subscription and access to Microsoft azure. I also have a nice amount of credits to spend, so it's good opportunity to get warm with Azure.

Posted October 5, 2016 by Adrian Wyssmann ‐ 17 min read

Regex101

Posted September 26, 2016 by Adrian Wyssmann ‐ 1 min read

.Net on Linux

.net core seems promising and can be used on linux as well. Let's have a look.

Posted September 15, 2016 by Adrian Wyssmann ‐ 2 min read

Unit Testing with Junit

Posted August 15, 2016 by Adrian Wyssmann ‐ 3 min read

Record your console session

Posted August 8, 2016 by Adrian Wyssmann ‐ 1 min read

Missing Languages in your Linux Distribution

Posted August 3, 2016 by Adrian Wyssmann ‐ 1 min read

Online Books

Posted August 3, 2016 by Adrian Wyssmann ‐ 1 min read

Current Date on Shell

Posted August 1, 2016 by Adrian Wyssmann ‐ 1 min read

Welcome on my site

Posted August 1, 2016 by Adrian Wyssmann ‐ 1 min read

Test Data

Test data is very important for testing, but why? and what is test data?

Posted April 6, 2016 by Adrian Wyssmann ‐ 6 min read

Diploma Thesis

Diploma Thesis of Computer Science study in HTI Biel

Project Docs

Some technical details and documentation